1. Implementation
Review the mathematical concept.
Review the problem solving steps.
READ: Children read the part that is asking them to find something out.
UNDERSTAND: Children explain what they need to find out.
Children identify what information they will need to find it out.
Remove the coloured rectangle.
Children find the information they need to find it out.
CHOOSE A STRATEGY: Children identify strategies that they could use to find it out.
USE A STRATEGY: Children use a strategy to find it out.
Children record their thinking as they find it out.
CHECK: Children reread the part that asked them to find something out.
Children check that they have found it out.
Children check they have recorded their solution correctly.
Children follow the problem solving steps to solve the 2nd level of the problem, with minimal teacher guidance.
Children who solve the 2nd level, follow the problem solving steps to solve the 3rd level of the problem independently.
Children use the problems as a guide to create their own problem, either alone or in pairs/small groups.
Children solve their own problem.
Throughout the lesson, children share solution strategies.
At the end of the lesson, children explain how they created their own problems.

2. Add and Subtract Three and Four-Digit
Problem Solving
Add and Subtract Three and Four-Digit
Numbers as Money
Lola had $ Jill had $98.35.
How much money did Lola and Jill have altogether?
Lola had $ Jill had $86.85.
How much money did Lola and Jill have altogether?
Lola had $ Jill had $
How much money did Lola and Jill have altogether?
Create your own problem! Now solve it!
Addition and Subtraction 23
Money and Financial Matters 9

3. Add and Subtract Three and Four-Digit
Problem Solving
Add and Subtract Three and Four-Digit
Numbers as Money
Olivia bought 2 items at the store for $2.36 and $4.87.
How much will Olivia pay if she pays cash?
Olivia bought 2 items at the store for $4.18 and $7.26.
How much will Olivia pay if she pays cash?
Olivia bought 2 items at the store for $12.36 and $7.67.
How much will Olivia pay if she pays cash?
Create your own problem! Now solve it!
Addition and Subtraction 23
Money and Financial Matters 9

4. Add and Subtract Three and Four-Digit
Problem Solving
Add and Subtract Three and Four-Digit
Numbers as Money
Altogether Lola and Jill collected $ for charity. Jill collected $38.45.
How much did Lola collect?
Altogether Lola and Jill collected $ for charity. Jill collected $51.75.
How much did Lola collect?
Altogether Lola and Jill collected $ for charity. Jill collected $74.95
How much did Lola collect?
Video 2 Hint: Change the money amounts and allow children to solve again!
Create your own problem! Now solve it!
Addition and Subtraction 23
Money and Financial Matters 9

5. Add and Subtract Three and Four-Digit
Problem Solving
Add and Subtract Three and Four-Digit
Numbers as Money
Addition and Subtraction 23
Money and Financial Matters 9

6. Add and Subtract Three and Four-Digit
Problem Solving
Add and Subtract Three and Four-Digit
Numbers as Money
Adela and George added their money together and got $14.70.
How much money might each child have?
Adela and George added their money together and got $26.95.
How much money might each child have?
Adela and George added their money together and got $
How much money might each child have?
Create your own problem! Now solve it!
Addition and Subtraction 23
Money and Financial Matters 9

7. Add and Subtract Three and Four-Digit
Problem Solving
Add and Subtract Three and Four-Digit
Numbers as Money
Matt had $6.80. He earned some more money. Altogether he had $11.40.
How much money did Matt earn?
Matt had $4.70. He earned some more money. Altogether he had $17.35.
How much money did Matt earn?
Matt had $ He earned some more money. Altogether he had $21.90.
How much money did Matt earn?
Create your own problem! Now solve it!
Addition and Subtraction 23
Money and Financial Matters 9

8. Add and Subtract Three and Four-Digit
Problem Solving
Add and Subtract Three and Four-Digit
Numbers as Money
Will had $7.85 less than Mary.
Mary had $12.40.
How much money does Will have?
Will had $7.75 less than Mary.
Mary had $15.85.
How much money does Will have?
Will had $24.20 less than Mary.
Mary had $16.85
How much money does Will have?
Create your own problem! Now solve it!
Addition and Subtraction 23
Money and Financial Matters 9