Khan Academy Videos: Class 10 math (India)

Real numbers: Class 10 math (India)
https://www.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:real-numbers

Polynomials: Class 10 math (India)
https://www.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:polynomials

Pair of linear equations in two variables: Class 10 math (India)
https://www.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:pair-of-linear-equations-in-two-variables

Quadratic equations: Class 10 math (India)
https://www.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:quadratic-equations

Arithmetic progressions: Class 10 math (India)
https://www.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:arithmetic-progressions

Triangles: Class 10 math (India)
https://www.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:triangles

Coordinate geometry: Class 10 math (India)
https://www.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:coordinate-geometry

Introduction to trigonometry: Class 10 math (India)
https://www.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:introduction-to-trigonometry

Some applications of trigonometry: Class 10 math (India)
https://www.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:some-applications-of-trigonometry

Circles: Class 10 math (India)
https://www.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:circles

Areas related to circles: Class 10 math (India)
https://www.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:areas-related-to-circles

Surface areas and volumes: Class 10 math (India)
https://www.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:surface-areas-and-volumes

Statistics: Class 10 math (India)
https://www.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:statistics

Probability: Class 10 math (India)
https://www.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:probability