Khan Academy Class 8 (NCERT) Math Videos and Exercises

Math Videos:

Rational numbers
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers#xa9e4cdc50bd97244:rational-numbers

Inverse property of addition
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers/xa9e4cdc50bd97244:the-role-of-0-and-1/v/inverse-property-of-addition
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:rational-numbers/x1091119cf1369fcf:the-role-of-0-and-1/v/inverse-property-of-addition-hindi

Inverse property of multiplication
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers/xa9e4cdc50bd97244:the-role-of-0-and-1/v/inverse-property-of-multiplication
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:rational-numbers/x1091119cf1369fcf:the-role-of-0-and-1/v/inverse-property-of-multiplication-hindi

Distributive property when multiplying
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers/xa9e4cdc50bd97244:distributive-property/v/using-the-distributive-property-when-multiplying

Ordering rational numbers
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers/xa9e4cdc50bd97244:untitled-629/v/ordering-rational-numbers

Linear equations in one variable
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable#xa9e4cdc50bd97244:linear-equations-in-one-variable

Worked example: two-step equations
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:solving-equations-with-variable-on-one-side/v/solving-equations-1
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:linear-equations-in-one-variable/x1091119cf1369fcf:solving-equations-with-variable-on-one-side/v/worked-example-two-step-equations-hindi

Equation with variables on both sides: fractions
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:solving-equations-with-variable-on-one-side/v/solving-equations-with-the-distributive-property-2
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:linear-equations-in-one-variable/x1091119cf1369fcf:solving-equations-with-variable-on-one-side/v/equation-with-variables-on-both-sides-fractions-hindi

Equation with variables on both sides: fractions
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:solving-equations-with-variables-on-both-sides/v/solving-equations-with-the-distributive-property-2
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:linear-equations-in-one-variable/x1091119cf1369fcf:solving-equations-with-variables-on-both-sides/v/equation-with-variables-on-both-sides-fractions-hindi

Equations with parentheses
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:solving-equations-with-variables-on-both-sides/v/solving-equations-with-the-distributive-property
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:linear-equations-in-one-variable/x1091119cf1369fcf:solving-equations-with-variables-on-both-sides/v/equations-with-parentheses-hindi

Two-step equation word problem: garden
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:linear-equations-word-problems/v/application-problems-with-equation-in-one-variable
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:linear-equations-in-one-variable/x1091119cf1369fcf:linear-equations-word-problems/v/two-step-equation-word-problem-garden-hindi

Sums of consecutive integers
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:linear-equations-word-problems/v/sum-consecutive-integers
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:linear-equations-in-one-variable/x1091119cf1369fcf:linear-equations-word-problems/v/sums-of-consecutive-integers-hindi

Two-step equation word problem: oranges
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:linear-equations-word-problems/v/linear-equation-word-problem-example
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:linear-equations-in-one-variable/x1091119cf1369fcf:linear-equations-word-problems/v/two-step-equation-word-problem-oranges-hindi

Understanding quadrilaterals
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals#xa9e4cdc50bd97244:understanding-quadrilaterals

Polygons as special curves
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:polygons/v/polygons-as-special-curves-basic-geometrical-ideas-class-6-india-khan-academy
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:understanding-quadrilaterals/x1091119cf1369fcf:polygons/v/polygons-as-special-curves-hindi

Sum of interior angles of a polygon
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:angle-sum-property/v/sum-of-interior-angles-of-a-polygon
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:understanding-quadrilaterals/x1091119cf1369fcf:angle-sum-property/v/sum-of-interior-angles-of-a-polygon-hindi

Sum of the exterior angles of a polygon
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:angle-sum-property/v/sum-of-the-exterior-angles-of-convex-polygon
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:understanding-quadrilaterals/x1091119cf1369fcf:angle-sum-property/v/sum-of-the-exterior-angles-of-a-polygon-hindi

Intro to quadrilateral
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:kinds-of-quadrilaterals/v/quadrilateral-overview
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:understanding-quadrilaterals/x1091119cf1369fcf:kinds-of-quadrilaterals/v/intro-to-quadrilateral-hindi

Quadrilateral types
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:kinds-of-quadrilaterals/v/quadrilateral-types-exercise
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:understanding-quadrilaterals/x1091119cf1369fcf:kinds-of-quadrilaterals/v/quadrilateral-types-hindi

Kites as a geometric shape
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:kinds-of-quadrilaterals/v/kites-as-a-mathematical-shape
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:understanding-quadrilaterals/x1091119cf1369fcf:kinds-of-quadrilaterals/v/kite-as-geometric-shape-hindi

Proof: Opposite sides of a parallelogram
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:properties-of-a-parallelogram/v/proof-opposite-sides-of-parallelogram-congruent
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:understanding-quadrilaterals/x1091119cf1369fcf:properties-of-a-parallelogram/v/proof-opposite-sides-of-a-parallelogram-are-equal-hindi

Proof: Opposite angles of a parallelogram
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:properties-of-a-parallelogram/v/proof-opposite-angles-of-parallelogram-congruent
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:understanding-quadrilaterals/x1091119cf1369fcf:properties-of-a-parallelogram/v/proof-opposite-angles-of-a-parallelogram-hindi

Proof: Diagonals of a parallelogram
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:properties-of-a-parallelogram/v/proof-diagonals-of-a-parallelogram-bisect-each-other
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:understanding-quadrilaterals/x1091119cf1369fcf:properties-of-a-parallelogram/v/proof-diagonals-of-a-parallelogram-bisect-each-other-hindi

Proof: Rhombus diagonals are perpendicular bisectors
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:some-special-parallelograms/v/proof-rhombus-diagonals-are-perpendicular-bisectors
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:understanding-quadrilaterals/x1091119cf1369fcf:some-special-parallelograms/v/proof-rhombus-diagonals-are-perpendicular-bisectors-hindi

Rhombus diagonals
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:some-special-parallelograms/v/rhombus-diagonals
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:understanding-quadrilaterals/x1091119cf1369fcf:some-special-parallelograms/v/rhombus-diagonals-hindi

Data handling
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling#xa9e4cdc50bd97244:data-handling

Reading pictographs
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling/xa9e4cdc50bd97244:looking-for-information-recap/v/reading-pictographs
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:data-handling/x1091119cf1369fcf:looking-for-information-recap/v/interpreting-picture-graphs-paint-hindi

Reading bar charts: comparing two sets of data
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling/xa9e4cdc50bd97244:looking-for-information-recap/v/reading-bar-charts-2
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:data-handling/x1091119cf1369fcf:looking-for-information-recap/v/reading-bar-graphs-bikes-hindi

Interpreting a histogram
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling/xa9e4cdc50bd97244:histograms/v/interpreting-histograms

Creating a histogram
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling/xa9e4cdc50bd97244:histograms/v/histograms-intro

Reading pie graphs (circle graphs)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling/xa9e4cdc50bd97244:pie-charts/v/reading-pie-graphs-circle-graphs

Squares and square roots
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots#xa9e4cdc50bd97244:squares-and-square-roots

Intro to square roots
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/xa9e4cdc50bd97244:square-roots-using-factorisation/v/introduction-to-square-roots

Understanding square roots
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/xa9e4cdc50bd97244:square-roots-using-factorisation/v/understanding-square-roots

Simplifying square roots
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/xa9e4cdc50bd97244:numbers-that-are-not-perfect-squares/v/simplifying-square-roots-1
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:squares-and-square-roots/x1091119cf1369fcf:numbers-that-are-not-perfect-squares/v/simplifying-square-root-hindi

Square roots by division method visualised
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/xa9e4cdc50bd97244:square-roots-using-long-division/v/square-root-by-division-method-visualised

Square root of decimal
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/xa9e4cdc50bd97244:square-roots-using-long-division/v/finding-square-root-of-decimal

Approximating square roots to hundredths
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/xa9e4cdc50bd97244:estimating-square-roots/v/approximating-square-roots

Cubes and cube roots
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:cubes-and-cube-roots#xa9e4cdc50bd97244:cubes-and-cube-roots

Intro to cube roots
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:cubes-and-cube-roots/xa9e4cdc50bd97244:cube-roots-using-factorisation/v/introduction-to-cube-roots
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:cubes-and-cube-roots/x1091119cf1369fcf:cube-roots-using-factorisation/v/intro-to-cube-roots-hindi

Simplifying a cube root
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:cubes-and-cube-roots/xa9e4cdc50bd97244:cube-roots-using-factorisation/v/simplifying-radical-expressions1
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:cubes-and-cube-roots/x1091119cf1369fcf:cube-roots-using-factorisation/v/simplifying-a-cube-root-hindi

Cube root of a non-perfect cube
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:cubes-and-cube-roots/xa9e4cdc50bd97244:numbers-that-are-not-perfect-cubes/v/simplifying-cube-roots-1
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:cubes-and-cube-roots/x1091119cf1369fcf:numbers-that-are-not-perfect-cubes/v/cube-root-of-a-non-perfect-cube-hindi

Comparing quantities
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities#xa9e4cdc50bd97244:comparing-quantities

Percent word problem: penguins
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:percent-change-word-problems/v/percent-word-problems-1-example-2

Percent word problem: magic club
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:percent-change-word-problems/v/percent-word-problem-examples

Intro to profit and loss
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:profit-and-loss/v/intro-to-profit-and-loss-comparing-quantities-class-7-india-math-khan-academy

Finding profit percent
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:profit-and-loss/v/finding-profit-percent-comparing-quantities-class-7-india-math-khan-academy

Percent word problems: tax and discount
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:tax-and-discount/v/tax-discount-and-tip-examples

Intro to compound interest
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:compound-interest/v/intro-to-compound-interest-class-8-india-math-khan-academy

Solved example: compound interest
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:compound-interest/v/solving-compound-interest-problems-class-8-india-math-khan-academy

Algebraic expressions and identities
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities#xa9e4cdc50bd97244:algebraic-expressions-and-identities

Adding polynomials
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:addition-and-subtraction/v/adding-and-subtracting-polynomials-1
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:algebraic-expressions-and-identities/x1091119cf1369fcf:addition-and-subtraction/v/adding-polynomial-hindi

Subtracting polynomials
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:addition-and-subtraction/v/subtracting-polynomials
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:algebraic-expressions-and-identities/x1091119cf1369fcf:addition-and-subtraction/v/subtracting-polynomial-hindi

Multiplying monomials
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:untitled-lesson-759/v/multiply-monomials-intro
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:algebraic-expressions-and-identities/x1091119cf1369fcf:multiplying-monomials-by-monomials/v/multiplying-monomials-hindi

Multiplying monomials challenge
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:untitled-lesson-759/v/missing-values-in-monomial-multiplication
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:algebraic-expressions-and-identities/x1091119cf1369fcf:multiplying-monomials-by-monomials/v/multiplying-monomials-challenge-hindi

Multiplying monomials by polynomials
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:multiplying-monomials-by-polynomials/v/multiplying-monomials-by-polynomials
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:algebraic-expressions-and-identities/x1091119cf1369fcf:multiplying-monomials-by-polynomials/v/multiplying-monomials-by-polynomials-hindi

Multiplying monomials by polynomials challenge
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:multiplying-monomials-by-polynomials/v/missing-values-in-monomial-polynomial-multiplication
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:algebraic-expressions-and-identities/x1091119cf1369fcf:multiplying-monomials-by-polynomials/v/multiplying-monomials-by-polynomials-challenge-hindi

Multiplying binomials intro
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:multiplying-binomials/v/multiplying-simple-binomials
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:algebraic-expressions-and-identities/x1091119cf1369fcf:multiplying-binomials/v/multiplying-binomials-intro-hindi

Multiplying binomials by polynomials
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:multiplying-binomials/v/more-multiplying-polynomials
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:algebraic-expressions-and-identities/x1091119cf1369fcf:multiplying-binomials/v/multiplying-binomials-by-polynomials-hindi

Special products of the form (x+a)(x-a)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:standard-identities/v/difference-of-squares-pattern-for-simple-binomials
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:algebraic-expressions-and-identities/x1091119cf1369fcf:standard-identities/v/special-products-of-the-form-xax-a-hindi

Squaring binomials of the form (x+a)²
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:standard-identities/v/pattern-for-squaring-simple-binomials
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:algebraic-expressions-and-identities/x1091119cf1369fcf:standard-identities/v/squaring-binomials-of-the-form-xa-hindi

Squaring binomials of the form (ax+b)²
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:standard-identities/v/square-a-binomial
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:algebraic-expressions-and-identities/x1091119cf1369fcf:standard-identities/v/squaring-binomials-of-the-form-axb-hindi

Polynomial word problem: total value of bills
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:polynomials-word-problems/v/polynomials-2
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:algebraic-expressions-and-identities/x1091119cf1369fcf:polynomial-word-problems/v/polynomial-word-problem-total-value-of-bills-hindi

Polynomial word problem: area of a window
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:polynomials-word-problems/v/multiplying-polynomials-2
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:algebraic-expressions-and-identities/x1091119cf1369fcf:polynomial-word-problems/v/polynomial-word-problem-area-of-a-window-hindi

Polynomial word problem: rectangle and circle area
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:polynomials-word-problems/v/polynomials1
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:algebraic-expressions-and-identities/x1091119cf1369fcf:polynomial-word-problems/v/polynomial-word-problem-rectangle-and-circle-area-hindi

Visualising solid shapes
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:visualising-solid-shapes#xa9e4cdc50bd97244:visualising-solid-shapes

Recognizing common 3D shapes
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:visualising-solid-shapes/xa9e4cdc50bd97244:faces-edges-and-vertices/v/recognizing-common-3d-shapes
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:visualising-solid-shapes/x1091119cf1369fcf:faces-edges-and-vertices/v/recognizing-common-3d-shapes-hindi

Counting faces and edges of 3D shapes
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:visualising-solid-shapes/xa9e4cdc50bd97244:faces-edges-and-vertices/v/counting-faces-and-edges-of-3d-shapes
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:visualising-solid-shapes/x1091119cf1369fcf:faces-edges-and-vertices/v/counting-faces-and-edges-of-3d-shapes-hindi

Mensuration
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:mensuration#xa9e4cdc50bd97244:mensuration

Area of trapezoids
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:mensuration/xa9e4cdc50bd97244:area-of-a-trapezium/v/area-of-a-trapezoid-1
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:mensuration/x1091119cf1369fcf:area-of-a-trapezium/v/area-of-trapezium-hindi

Area of composite shapes
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:mensuration/xa9e4cdc50bd97244:area-of-a-polygon/v/area-breaking-up-shape
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:mensuration/x1091119cf1369fcf:area-of-a-polygon/v/area-of-composite-shapes-hindi

Surface area of a box (cuboid)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:mensuration/xa9e4cdc50bd97244:cube-and-cuboid/v/surface-area-of-a-box
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:mensuration/x1091119cf1369fcf:cube-and-cuboid/v/surface-area-of-a-box-cuboid-hindi

Volume of a rectangular prism
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:mensuration/xa9e4cdc50bd97244:cube-and-cuboid/v/volume-of-a-rectangular-prism-or-box-examples
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:mensuration/x1091119cf1369fcf:cube-and-cuboid/v/volume-of-rectangular-prism-hindi

Cylinder volume & surface area
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:mensuration/xa9e4cdc50bd97244:cylinder/v/cylinder-volume-and-surface-area
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:mensuration/x1091119cf1369fcf:cylinder/v/cylinder-volume-hindi

https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:mensuration/x1091119cf1369fcf:cylinder/v/cylinder-surface-area-hindi

Exponents and powers
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers#xa9e4cdc50bd97244:exponents-and-powers

Worked example: Exponent properties
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:laws-of-exponents/v/exponent-properties-4
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:exponents-and-powers/x1091119cf1369fcf:laws-of-exponents-recap/v/exponent-properties-4-hindi

Negative exponents
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:negative-exponents/v/negative-exponents
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:exponents-and-powers/x1091119cf1369fcf:negative-exponents/v/negative-exponents-hindi

Negative exponent intuition
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:negative-exponents/v/negative-exponent-intuition
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:exponents-and-powers/x1091119cf1369fcf:negative-exponents/v/negative-exponent-intuition-hindi

Multiplying & dividing powers (integer exponents)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:laws-of-exponents-more-practice/v/multiplying-and-dividing-powers-with-integer-exponents
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:exponents-and-powers/x1091119cf1369fcf:laws-of-exponents-more-practice/v/multiplying-dividing-powers-integer-exponents-hindi

Powers of products & quotients (integer exponents)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:laws-of-exponents-more-practice/v/powers-of-products-and-quotients-integer-exponents
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:exponents-and-powers/x1091119cf1369fcf:laws-of-exponents-more-practice/v/powers-of-products-quotients-integer-exponents-hindi

Introduction to scientific notation
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:numbers-in-standard-form/v/scientific-notation-old

Scientific notation examples
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:numbers-in-standard-form/v/scientific-notation-examples

Orders of magnitude exercise example 2
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:numbers-in-standard-form/v/orders-of-magnitude-exercise-example-2

Orders of magnitude exercise example 1
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:numbers-in-standard-form/v/orders-of-magnitude-exercise-example-1

Factorisation
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation#xa9e4cdc50bd97244:factorisation

Worked example: finding the missing monomial factor
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factors-of-a-monomial/v/finding-algebraic-factor-of-a-monomial
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:factorisation/x1091119cf1369fcf:factors-of-a-monomial/v/worked-example-finding-the-missing-monomial-factor-hindi

Greatest common factor of monomials
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factorisation-using-common-factors/v/monomial-greatest-common-factor
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:factorisation/x1091119cf1369fcf:factorisation-using-common-factors/v/greatest-common-factor-of-monomials-hindi

Taking common factor from binomial
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factorisation-using-common-factors/v/algebraic-factoring-by-greatest-common-monomial-factor

Difference of squares intro
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factorisation-using-identities/v/difference-of-squares-intro
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:factorisation/x1091119cf1369fcf:factorisation-using-identities/v/difference-of-squares-intro-hindi

Perfect square factorization intro
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factorisation-using-identities/v/perfect-square-factorization-intro
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:factorisation/x1091119cf1369fcf:factorisation-using-identities/v/perfect-square-factorization-intro-hindi

Factoring quadratics as (x+a)(x+b)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factors-of-the-form-x-a-x-b/v/factoring-simple-quadratic-expression
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:factorisation/x1091119cf1369fcf:factors-of-the-form-x-a-x-b/v/factoring-quadratics-as-xaxb-example-2-hindi

More examples of factoring quadratics as (x+a)(x+b)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factors-of-the-form-x-a-x-b/v/factoring-quadratic-expressions
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:factorisation/x1091119cf1369fcf:factors-of-the-form-x-a-x-b/v/more-examples-of-factoring-quadratics-as-xaxb-hindi

Divide polynomials by x (with remainders)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:dividing-polynomials-by-monomials/v/polynomial-divided-by-monomial
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:factorisation/x1091119cf1369fcf:dividing-polynomials-by-monomials/v/dividing-polynomials-with-remainders-hindi

Divide polynomials by monomials (with remainders)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:dividing-polynomials-by-monomials/v/dividing-polynomials-with-remainders-example
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:factorisation/x1091119cf1369fcf:dividing-polynomials-by-monomials/v/dividing-polynomials-with-remainders-monomial-divisors-hindi

Dividing polynomials with remainders
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:dividing-polynomials-by-polynomials/v/dividing-polynomials-with-remainders
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:factorisation/x1091119cf1369fcf:dividing-polynomials-by-polynomials/v/dividing-polynomials-with-remainders-hindi

Introduction to graphs
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:introduction-to-graphs#xa9e4cdc50bd97244:introduction-to-graphs

Introduction to the coordinate plane
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:introduction-to-graphs/xa9e4cdc50bd97244:coordinates/v/introduction-to-the-coordinate-plane
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:introduction-to-graphs/x1091119cf1369fcf:coordinates/v/introduction-to-the-coordinate-plane-hindi

Interpreting plotted points
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:introduction-to-graphs/xa9e4cdc50bd97244:distance-between-points-in-the-first-quadrant/v/interpreting-plotted-points
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:introduction-to-graphs/x1091119cf1369fcf:distance-between-points-in-the-first-quadrant/v/interpreting-plotted-points-hindi

Playing with numbers
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:playing-with-numbers#xa9e4cdc50bd97244:playing-with-numbers

Divisibility tests for 2, 3, 4, 5, 6, 9, 10
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:playing-with-numbers/xa9e4cdc50bd97244:test-for-divisibility/v/divisibility-tests-for-2-3-4-5-6-9-10
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:playing-with-numbers/x1091119cf1369fcf:test-for-divisibility/v/divisibility-tests-for-2-3-4-5-6-9-10-hindi

The why of the 3 divisibility rule
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:playing-with-numbers/xa9e4cdc50bd97244:test-for-divisibility/v/the-why-of-the-3-divisibility-rule
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:playing-with-numbers/x1091119cf1369fcf:test-for-divisibility/v/the-why-of-the-3-divisibility-rule-hindi

The why of the 9 divisibility rule
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:playing-with-numbers/xa9e4cdc50bd97244:test-for-divisibility/v/the-why-of-the-9-divisibility-rule
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:playing-with-numbers/x1091119cf1369fcf:test-for-divisibility/v/the-why-of-the-9-divisibility-rule-hindi

Common divisibility examples
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:playing-with-numbers/xa9e4cdc50bd97244:some-more-divisibility-tests/v/common-divisibility-examples
https://www.khanacademy.org/math/in-in-class-8-math-india-hindi/x1091119cf1369fcf:playing-with-numbers/x1091119cf1369fcf:some-more-divisibility-tests/v/common-divisibility-examples-hindi

...........................................................................
Math Exercises:

Rational numbers
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers#xa9e4cdc50bd97244:rational-numbers

Finding reciprocal of a fraction
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers/xa9e4cdc50bd97244:the-role-of-0-and-1/e/finding-reciprocal-of-a-fraction Exercise 1.1

Additive and multiplicative inverse of a rational no.
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers/xa9e4cdc50bd97244:the-role-of-0-and-1/e/additive-and-multiplicative-inverse-of-a-rational-number Exercise 1.1

Visualize distributive property
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers/xa9e4cdc50bd97244:distributive-property/e/visualize-distributive-property Exercise 1.1

Distributive property
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers/xa9e4cdc50bd97244:distributive-property/e/distributive-property-of-multiplication- Exercise 1.1

Order rational numbers
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers/xa9e4cdc50bd97244:untitled-629/e/comparing-rational-numbers

Rational numbers on the number line
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers/xa9e4cdc50bd97244:untitled-629/e/fractions_on_the_number_line_3

Rational numbers between two rational nos.
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers/xa9e4cdc50bd97244:untitled-632/e/rational-numbers-between-two-rational-numbers Exercise 1.2

Finding real numbers between two rational nos.
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers/xa9e4cdc50bd97244:untitled-632/e/finding-rational-numbers-between-two-rational-numbers Exercise 1.2

Unit test on Rational numbers
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:rational-numbers/test/xa9e4cdc50bd97244:rational-numbers-unit-test?modal=1 Chapter Assessment

Linear equations in one variable
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable#xa9e4cdc50bd97244:linear-equations-in-one-variable

Two-step equations
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:solving-equations-with-variable-on-one-side/e/linear_equations_2 Exercise 2.1

Equations with var. on both sides: decimals & frac.
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:solving-equations-with-variable-on-one-side/e/variables-on-both-sides-rational Exercise 2.3

Equations with variables on both sides
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:solving-equations-with-variables-on-both-sides/e/linear_equations_3 Exercise 2.3

Equations with parentheses: decimals & fractions
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:solving-equations-with-variables-on-both-sides/e/multi-step-equations-rational

Solving equations reducible to linear from
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:untitled-653/e/equations-convertible-to-linear Exercise 2.5,

Exercise 2.6
Word problems linear equations (basic)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:linear-equations-word-problems/e/word-problems-linear-equations--basic- Exercise 2.2

Sums of consecutive integers
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:linear-equations-word-problems/e/integer_sums Exercise 2.4

Linear equations word problems (advanced)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/xa9e4cdc50bd97244:linear-equations-word-problems/e/word-problems-linear-equations--advanced- Exercise 2.6

Unit test on Linear equations in one variable
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:linear-equations-in-one-variable/test/xa9e4cdc50bd97244:linear-equations-in-one-variable-unit-test?modal=1 Chapter Assessment

Understanding quadrilaterals
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals#xa9e4cdc50bd97244:understanding-quadrilaterals

Open and closed curves
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:polygons/e/open-and-closed-curves Exercise 3.1

Polygon types
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:polygons/e/concave-vs-convex--regular-vs-irregular-polygons-8th Exercise 3.1

Angles of a polygon
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:angle-sum-property/e/angles_of_a_polygon Exercise 3.1

Interior and exterior angles of a polygon
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:angle-sum-property/e/regular-polygons-formulae-8th Exercise 3.2

Analyze quadrilaterals
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:kinds-of-quadrilaterals/e/categorize-quadrilaterals Exercise 3.4

Quadrilateral types
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:kinds-of-quadrilaterals/e/quadrilateral_types Exercise 3.4

Side and angle properties of a parallelogram (level 1)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:properties-of-a-parallelogram/e/using-properties-basic-8th Exercise 3.3

Side and angle properties of a parallelogram (level 2)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:properties-of-a-parallelogram/e/diagonal-properties-of-quadrilaterals-8th Exercise 3.3

Diagonal properties of parallelogram
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/xa9e4cdc50bd97244:properties-of-a-parallelogram/e/regular-polygons-advanced-8th Exercise 3.3

Unit test on Understanding quadrilaterals
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:understanding-quadrilaterals/test/xa9e4cdc50bd97244:understanding-quadrilaterals-unit-test?modal=1 Chapter Assessment

Data handling
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling#xa9e4cdc50bd97244:data-handling

Read picture graphs (multi-step problems)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling/xa9e4cdc50bd97244:looking-for-information-recap/e/reading_pictographs_2

Read bar graphs (2-step problems)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling/xa9e4cdc50bd97244:looking-for-information-recap/e/reading_bar_charts_2

Knowing frequency distribution table better
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling/xa9e4cdc50bd97244:untitled-685/e/knowing-frequency-distribution-table-better Exercise 5.1

Constructing frequency table
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling/xa9e4cdc50bd97244:untitled-685/e/constructing-frequency-table Exercise 5.1

Read histograms
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling/xa9e4cdc50bd97244:histograms/e/reading-histograms Exercise 5.1

Create histograms
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling/xa9e4cdc50bd97244:histograms/e/creating-histograms Exercise 5.1

Plotting pie charts
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling/xa9e4cdc50bd97244:pie-charts/e/plotting-pie-charts Exercise 5.2

Unit test on Data handling
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:data-handling/test/xa9e4cdc50bd97244:data-handling-unit-test?modal=1 Chapter Assessment

Squares and square roots
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots#xa9e4cdc50bd97244:squares-and-square-roots

Square roots
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/xa9e4cdc50bd97244:square-roots-using-factorisation/e/square_roots Exercise 6.3

Square roots using prime factorisation (advanced)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/xa9e4cdc50bd97244:square-roots-using-factorisation/e/square-roots-using-prime-factorisation--advanced- Exercise 6.3

Simplify square roots
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/xa9e4cdc50bd97244:numbers-that-are-not-perfect-squares/e/simplifying_radicals

Multiply or divide to make a perfect square
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/xa9e4cdc50bd97244:numbers-that-are-not-perfect-squares/e/multiply-or-divide-to-make-a-perfect-square

Number of digits in a square root of a number
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/xa9e4cdc50bd97244:square-roots-using-long-division/e/number-of-digits-in-a-square-root-of-a-number Exercise 6.4

Finding square roots using division method
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/xa9e4cdc50bd97244:square-roots-using-long-division/e/finding-square-roots-using-division-method Exercise 6.4

Roots of decimals & fractions
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/xa9e4cdc50bd97244:square-roots-using-long-division/e/roots-of-decimals-and-fractions Exercise 6.4

Approximating square roots
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/xa9e4cdc50bd97244:estimating-square-roots/e/square_roots_2 Exercise 6.4

Unit test on Squares and square roots
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:squares-and-square-roots/test/xa9e4cdc50bd97244:squares-and-square-roots-unit-test?modal=1 Chapter Assessment

Cubes and cube roots
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:cubes-and-cube-roots#xa9e4cdc50bd97244:cubes-and-cube-roots

Cube roots
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:cubes-and-cube-roots/xa9e4cdc50bd97244:cube-roots-using-factorisation/e/cube_roots Exercise 7.2

Multiply divide to make it a perfect cube
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:cubes-and-cube-roots/xa9e4cdc50bd97244:numbers-that-are-not-perfect-cubes/e/multiply-divide-to-make-it-a-perfect-cube Exercise 7.1

Units digit of a cube root
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:cubes-and-cube-roots/xa9e4cdc50bd97244:cube-roots-using-long-division/e/units-digit-of-a-perfect-cube Exercise 7.1

Cube root of a cube no.
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:cubes-and-cube-roots/xa9e4cdc50bd97244:cube-roots-using-long-division/e/estimating-cube-roots Exercise 7.2

Unit test on Cubes and cube roots
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:cubes-and-cube-roots/test/xa9e4cdc50bd97244:cubes-and-cube-roots-unit-test?modal=1 Chapter Assessment

Comparing quantities
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities#xa9e4cdc50bd97244:comparing-quantities

Percent word problems
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:percent-change-word-problems/e/percentage_word_problems_1 Exercise 8.1

Percentage change word problems
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:percent-change-word-problems/e/percentage-change-word-problems Exercise 8.1

Profit and loss percent problems
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:profit-and-loss/e/profit-and-loss-percentages Exercise 8.2

Profit and loss word problems
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:profit-and-loss/e/profit-and-loss-word-problems-in Exercise 8.2

Tax and tip word problems
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:tax-and-discount/e/tax-and-tip-word-problems Exercise 8.2

Discount, markup, and commission word problems
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:tax-and-discount/e/discount_tax_and_tip_word_problems Exercise 8.2

Find compound interest
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:compound-interest/e/compound-interest Exercise 8.3

Word problems on compound interest
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/xa9e4cdc50bd97244:compound-interest/e/word-problems-on-compound-interest Exercise 8.3

Unit test on Comparing quantities
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:comparing-quantities/test/xa9e4cdc50bd97244:comparing-quantities-unit-test?modal=1 Chapter Assessment

Algebraic expressions and identities
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities#xa9e4cdc50bd97244:algebraic-expressions-and-identities

Add polynomials (intro)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:addition-and-subtraction/e/adding_and_subtracting_polynomials Exercise 9.1

Subtract polynomials (intro)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:addition-and-subtraction/e/subtract-polynomials Exercise 9.1

Multiply monomials
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:untitled-lesson-759/e/finding-the-product-of-two-monomials Exercise 9.2

Multiply monomials
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:untitled-lesson-759/e/multiply-monomials-challenge Exercise 9.2

Multiply monomials by polynomials
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:multiplying-monomials-by-polynomials/e/finding-the-product-of-a-monomial-and-a-polynomial Exercise 9.3

Multiply monomials by polynomials challenge
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:multiplying-monomials-by-polynomials/e/multiply-monomials-by-polynomials-challenge Exercise 9.3

Multiply binomials intro
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:multiplying-binomials/e/multiplying_expressions_0.5 Exercise 9.4

Multiply binomials
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:multiplying-binomials/e/multiply-binomials-coefficient Exercise 9.4

Multiply binomials by polynomials
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:multiplying-binomials/e/multiplying_polynomials Exercise 9.4

Multiply difference of squares
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:standard-identities/e/multiplying_expressions_1 Exercise 9.3

Polynomial special products: perfect square
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/xa9e4cdc50bd97244:standard-identities/e/finding-special-products Exercise 9.3

Unit test on Algebraic expressions and identities
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:algebraic-expressions-and-identities/test/xa9e4cdc50bd97244:algebraic-expressions-and-identities-unit-test?modal=1 Chapter Assessment

Visualising solid shapes
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:visualising-solid-shapes#xa9e4cdc50bd97244:visualising-solid-shapes

Identify geometric solids (3D shapes)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:visualising-solid-shapes/xa9e4cdc50bd97244:faces-edges-and-vertices/e/identify-geometric-solids--3d-figures- Exercise 10.3

Identify parts of 3D shapes
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:visualising-solid-shapes/xa9e4cdc50bd97244:faces-edges-and-vertices/e/identify-parts-of-3d-shapes Exercise 10.3

Mensuration
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:mensuration#xa9e4cdc50bd97244:mensuration

Area of trapezoids
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:mensuration/xa9e4cdc50bd97244:area-of-a-trapezium/e/areas_of_trapezoids_rhombi_and_kites Exercise 11.2

Area of composite shapes
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:mensuration/xa9e4cdc50bd97244:area-of-a-polygon/e/area-of-quadrilaterals-and-polygons Exercise 11.2

Volume of rectangular prisms
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:mensuration/xa9e4cdc50bd97244:cube-and-cuboid/e/volume_1 Exercise 11.4

Volume of cylinders
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:mensuration/xa9e4cdc50bd97244:cylinder/e/volumes-of-cones--cylinders--and-spheres Exercise 11.4

Unit test on Mensuration
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:mensuration/test/xa9e4cdc50bd97244:mensuration-unit-test?modal=1 Chapter Assessment

Exponents and powers
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers#xa9e4cdc50bd97244:exponents-and-powers

Multiply powers
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:laws-of-exponents/e/multiply-powers

Powers of powers
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:laws-of-exponents/e/powers-of-powers

Divide powers
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:laws-of-exponents/e/divide-powers

Powers of products & quotients
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:laws-of-exponents/e/powers-of-products-and-quotients

Negative exponents
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:negative-exponents/e/exponents_2 Exercise 12.1

Multiply & divide powers (integer exponents)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:laws-of-exponents-more-practice/e/exponent_rules Exercise 12.1

Powers of products & quotients (integer exponents)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:laws-of-exponents-more-practice/e/powers-of-powers-int-exp Exercise 12.1

Properties of exponents challenge (integer exponents)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:laws-of-exponents-more-practice/e/properties-of-integer-exponents Exercise 12.1

Scientific notation
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/xa9e4cdc50bd97244:numbers-in-standard-form/e/scientific_notation Exercise 12.2

Unit test on Exponents and powers
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:exponents-and-powers/test/xa9e4cdc50bd97244:exponents-and-powers-unit-test?modal=1 Chapter Assessment

Factorisation
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation#xa9e4cdc50bd97244:factorisation

Factor monomials
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factors-of-a-monomial/e/factoring-monomials Exercise 14.1

Greatest common factor of monomials
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factorisation-using-common-factors/e/greatest-common-factor-of-monomials Exercise 14.1

Factor polynomials: common factor
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factorisation-using-common-factors/e/factoring-polynomials Exercise 14.1

Difference of squares
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factorisation-using-identities/e/factoring_difference_of_squares_2

Perfect squares
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factorisation-using-identities/e/factoring-perfect-squares Exercise 14.2

Factor polynomials using structure
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factorisation-using-identities/e/factoring_difference_of_squares_3 Exercise 14.2

Factoring quadratics intro
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factors-of-the-form-x-a-x-b/e/factoring_polynomials_1 Exercise 14.2

Factor quadratics by grouping
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:factors-of-the-form-x-a-x-b/e/factoring_polynomials_by_grouping_1 Exercise 14.2

Divide polynomials by monomials (with remainders)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:dividing-polynomials-by-monomials/e/divide-polynomials-by-monomials Exercise 14.3

Divide polynomials by linear expressions
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:dividing-polynomials-by-polynomials/e/divide-polynomials-by-binomials Exercise 14.3

Divide polynomials with remainders
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/xa9e4cdc50bd97244:dividing-polynomials-by-polynomials/e/dividing-polynomials-with-remainders Exercise 14.3

Unit test on Factorisation
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:factorisation/test/xa9e4cdc50bd97244:factorisation-unit-test?modal=1 Chapter Assessment

Introduction to graphs
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:introduction-to-graphs#xa9e4cdc50bd97244:introduction-to-graphs

Identify coordinates
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:introduction-to-graphs/xa9e4cdc50bd97244:coordinates/e/identify-coordinates Exercise 15.2

Identify points
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:introduction-to-graphs/xa9e4cdc50bd97244:coordinates/e/identifying-points Exercise 15.2

Distance between points in first quadrant
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:introduction-to-graphs/xa9e4cdc50bd97244:distance-between-points-in-the-first-quadrant/e/distance-between-points-in-first-quadrant-of-coordinate-plane Exercise 15.3

Coordinate plane word problems (quadrant 1)
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:introduction-to-graphs/xa9e4cdc50bd97244:distance-between-points-in-the-first-quadrant/e/coordinate-plane-word-problems--quadrant-1---basic- Exercise 15.3

Unit test on Introduction to graphs
https://www.khanacademy.org/math/in-in-class-8th-math-cbse/xa9e4cdc50bd97244:introduction-to-graphs/tes