## Lesson: Using Arrays to Show Multiplication Concepts

Introducing the Concept

Students used equal groups to multiply in the first lesson on multiplication in their math books. Now they will use this experience to explore how to use arrays to multiply.

**Materials:** 15 counters and an overhead projector for demonstration, one sheet of paper and 15 counters for each student or pair of students

**Preparation:** Distribute paper and counters to students after you demonstrate the concept.

**Prerequisite Skills and Background:** Students should know how to use equal groups to multiply.

- Place 2 groups of 4 counters on the overhead projector.

- Rearrange the counters in 2 rows of 4.