Students learn how to calculate a simple interest over a period of time.

Later, as learning progresses from calculating a simple interest to finding the principal amount, duration, and interest rate when the simple interest is known.

**Differentiated Learning Objectives**

- All students should be able to calculate a simple interest for 1 year.
- Most students should be able to calculate a simple interest paid over time.
- Some students should be able to work out the rate of simple interest.