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My Money Rule

A Money Detectives lesson. This page is for grown-ups: preview it before your kid plays, or talk about it after.

Decide your split before money arrives. Then saving happens first, every time.

For ages 8–10 (grades 3–5) · about 15 minutes · read-aloud on every screen

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What your kid learns

  • Make a rule

    A money rule splits every dollar the same way. The same rule every time means no arguing with yourself.

  • Save first

    Save comes off first. Then you spend what’s left. Grown-ups do this with automatic savings.

  • The extra cent

    Some amounts don’t split evenly. Then the extra cent goes to Save. Owe a grown-up money? Pay that back first. Then your rule splits the rest.

The story: The Case of the Empty Save Jar

In a kitchen, Priya shows Diego how a money rule splits a pretend $20 so Save fills first.

  1. Helper: A puzzle, detectives! Diego’s Save jar stays empty.
  2. Diego: I always mean to save. But I spend it first.
  3. Priya: Try a money rule. Decide the split before money comes.
  4. Priya: Like this: every $10 makes $6 Save and $4 Spend.
  5. Diego: I just got a pretend $20. So $12 Save and $8 Spend!
  6. Diego: Save went first. Now my jar is growing!
  7. Helper: Case closed! Save first, spend the rest.

The game: Rule Maker

Your rule: every $10 makes $6 Save and $4 Spend. Split a pretend $30 gift with your rule.

Games use pretend money and work with taps or a keyboard. Nothing is timed.

New words

money rule
a plan that splits every dollar the same way
split
dividing money into parts
pay yourself first
saving before you spend
Also called: automatic savings
percent sign
a clue symbol. 50% = half. 10% = 1 out of 10.

Questions at the end

  • Rule: every $10 makes $6 Save and $4 Spend. How does a pretend $20 split?
  • Why save first, before spending?
  • A split leaves one extra cent. Where does it go?

Remember this

Save first, spend the rest.

Talk about it

Ask your kid to explain their money rule, and talk about whether you use one.

Try it at home: Make a rule card

  1. Write a money rule for pretend money.
  2. Example: every $10 makes $6 Save and $4 Spend.
  3. Try your rule on a pretend $20.

Make a rule card for pretend money.

School standards

  • National Standards for Personal Financial Education: Saving
  • Common Core Math 4.NF.B.4
  • Common Core Math 4.MD.A.2
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Lessons teach how money works. They are not financial advice.