## Lesson: Ordered Pairs

Introducing the Concept

Your students encountered ordered pairs last year, but it will be worthwhile to review with them how to graph points on the plane. Relating the *x-* and *y-*axes to a number line will help your students find ordered pairs when graphing.

**Materials: ** overhead transparency or poster paper

**Preparation: ** Draw a coordinate grid on a transparency or poster paper. Use Learning Tool 20 in the *Learning Tools Folder.*

Locate a point on a wall of the classroom a few feet in from the left side of the wall and a few feet up from the floor. Tape a paper plate or circular cutout to the wall to indicate the point.

**Prerequisite Skills and Concepts:** Students need to understand positive and negative numbers and how to locate points on a number line.