Students learn how to work out the factor pairs of a number.

Later, as learning progresses they use factor pairs to investigate different perimeters for a rectangle of fixed area.

**Differentiated Learning Objectives**

- All students should be able to calculate the factors of an integer using a times table grid.
- Most students should be able to calculate the factors of an integer using mental methods.
- Some students should be able to discover the first ten prime and square numbers by considering their factors./li>