Financial Literacy Grade 3 Budgeting Planning How to Spend

Grade 3 Financial Literacy Study Guide: Budgeting – Planning How to Spend

1. The Driving Question

"If you get $10 every week for doing chores, and you want to buy a $30 toy in three weeks, how do you make sure you don’t spend that money on candy or stickers first? Why can’t you just buy everything you want right now—and what’s the trick to saving up without feeling like you’re missing out?"

2. The Core Idea – Built, Not Listed

Imagine your piggy bank is a lemonade stand. Every Saturday, you earn $5 from selling lemonade to neighbors. You could spend all $5 on gumballs right away, but then you’d never save enough for the $20 water bottle you really want. A budget is like a map for your money: it tells you how much to spend now (like $1 on a snack), how much to save later (like $3 for the water bottle), and how much to give (like $1 to a friend’s birthday gift). Without a budget, your money disappears like ice cream on a hot day—you don’t even realize it’s gone until it’s too late.

Here’s how it works: 1. Income: The money you get (like your $5 lemonade earnings or $10 from chores).
2. Expenses: The things you spend money on (like gumballs, stickers, or a new book).
3. Savings: The money you set aside for bigger things (like that $20 water bottle).
4. Goal: What you’re saving for (like the water bottle or a video game).

Key Vocabulary:
- Income: Money you receive, like allowance or gift money.
Example: Your grandma gives you $5 for your birthday.
(Note: In middle school, you’ll learn about taxes taking a bite out of income—like when you get paid for a job but don’t take home the full amount!)

• Expense: Something you spend money on.
  Example: Buying a $2 pack of trading cards at the school store.
  (Note: In high school, you’ll learn about "fixed expenses" like rent, which stay the same every month, vs. "variable expenses" like snacks, which change.)

• Savings: Money you keep to use later.
  Example: Putting $1 from your $5 allowance into a jar every week so you can buy a $15 LEGO set in three weeks.
  (Note: In college, you’ll learn about "emergency savings" for unexpected costs, like a flat bike tire.)

• Budget: A plan for how you’ll use your money.
  Example: Deciding ahead of time that out of your $10 allowance, $3 goes to snacks, $5 goes to savings, and $2 goes to a gift for your sibling.

3. Assessment Translation (Grade 3: Classroom Formative Assessment)

How this topic appears in class:
- Exit tickets: A short question like, "If you earn $8 this week and spend $3 on a toy, how much do you have left to save?" (Show your work!) - Short constructed response: "You want to buy a $12 book in two weeks. You earn $5 each week. How much should you save each week? Explain your answer." - Show-your-work problems: A table with columns for Income, Expenses, and Savings, where students fill in numbers for a pretend scenario (e.g., "You earn $10. You spend $4 on a snack. How much can you save?").

What a "proficient" vs. "developing" response looks like:
| Proficient | Developing | |----------------|----------------| | "I earn $5 each week. I want a $12 book in two weeks. $12 ÷ 2 = $6, so I need to save $6 each week. I can’t spend any of my $5 because $5 is less than $6. I need to earn more or wait longer." | "I save $5 each week. Then I can buy the book." (Doesn’t show math or explain why $5 isn’t enough.) | | Shows all steps, explains reasoning, and adjusts the plan if needed. | Missing steps, doesn’t connect income to savings goal, or ignores the time limit. |

What the teacher looks for:
- Did you subtract expenses from income to find savings? - Did you divide the goal by the number of weeks to see if it’s possible? - Did you explain your answer in words, not just numbers?

Model Proficient Response:
Prompt: "You earn $7 each week. You want to buy a $20 video game in three weeks. How much should you save each week? Can you do it?" Response: "I need $20 in 3 weeks, so $20 ÷ 3 = $6.67. I earn $7 each week, so I can save $6 each week and have $1 left for something small. Yes, I can do it because $6 × 3 = $18, and I’ll have $1 extra. But if I want to save the whole $7, I’ll have $21, which is even better!"

4. Mistake Taxonomy

Mistake 1: Ignoring the Time Limit
Prompt: "You earn $5 each week. You want a $15 toy in two weeks. How much should you save each week?" Common Wrong Answer: "I save $5 each week. Then I have $10, and I can buy the toy." Why It Loses Credit: The student didn’t divide the goal ($15) by the number of weeks (2). They assumed saving all their money would work, but $5 × 2 = $10, which isn’t enough.
Correct Approach: 1. Divide the goal by the number of weeks: $15 ÷ 2 = $7.50.
2. Compare to income: $5 < $7.50, so it’s not possible in two weeks.
3. Adjust the plan: "I need to save for three weeks instead, or earn more money."

Mistake 2: Forgetting to Subtract Expenses
Prompt: "You earn $10. You spend $4 on a snack and $2 on stickers. How much can you save?" Common Wrong Answer: "I save $10." Why It Loses Credit: The student didn’t subtract the expenses ($4 + $2 = $6) from the income ($10). They ignored the spending part of the budget.
Correct Approach: 1. Add up expenses: $4 + $2 = $6.
2. Subtract from income: $10 – $6 = $4.
3. Answer: "I can save $4."

Mistake 3: Mixing Up Savings and Expenses
Prompt: "You earn $8. You save $3 and spend $6. Is this a good budget? Why or why not?" Common Wrong Answer: "Yes, because I saved some money." Why It Loses Credit: The student didn’t check if the numbers add up. $3 (savings) + $6 (expenses) = $9, but income is only $8. They spent more than they earned! Correct Approach: 1. Add savings and expenses: $3 + $6 = $9.
2. Compare to income: $9 > $8, so it’s not possible.
3. Answer: "No, because $3 + $6 = $9, and I only earn $8. I need to save less or spend less."

5. Connection Layer

1. Within Financial Literacy → Opportunity Cost: When you choose to save for the $20 water bottle, you’re giving up buying gumballs every week. Understanding budgets helps you see what you’re not buying—like how skipping one $3 toy now means you can get a $15 toy later.

2. Across Subjects → Math (Division and Multiplication): Budgeting is just division in disguise! If you want $12 in 3 weeks, you’re really solving $12 ÷ 3 = $4 per week. The same math helps you split a pizza with friends or divide chores among siblings.

3. Outside School → Grocery Store Sales: Ever see a sign that says "3 for $5"? Stores use budgets too! They plan how much to charge so they make money, just like you plan how much to save so you can buy what you want. Next time you’re at the store, notice how prices are set to make you spend (or save) in certain ways.

6. The Stretch Question

"If you get $10 every week, and you want to buy a $50 bike in five weeks, but your friend invites you to a $15 movie in two weeks, should you go? What’s your new budget plan if you do?"

Pointer Toward the Answer:
First, check if you can still save enough for the bike if you spend $15 on the movie. You’d have $10 × 5 = $50 total, but $50 – $15 = $35 left for the bike, which isn’t enough. So you’d need to: 1. Skip the movie or 2. Earn extra money (like selling old toys) or 3. Ask your friend if you can go to a cheaper activity, like a park hangout.
The trick is to adjust your plan—budgets aren’t set in stone, but you have to think ahead!