## Lesson: Placing Negative Numbers on a Number Line

Introducing the Concept

Your students will have used a number line before, but it may not have included negative numbers. Your students will also have had experiences with real-life applications that could be modeled by the set of integers. Spend some time discussing applications involving opposite directions, such as walking forward or backward, temperature going up and down, or profits and losses in a business. This will help your students better understand the concept of negative numbers.

**Materials:** large model of a number line from ^{-}10 to ^{+}10 with only zero and the numerals 1 to 10 written beneath their marks (see below); strips of paper for students to make their own number lines

**Preparation:** Construct a large number line and post it where students can see it. Cut out strips of paper for your students to construct their own number lines.

**Prerequisite Skills and Concepts:** Students will have worked with number lines before. They should be able to locate an unmarked number on the number line. They should also be able to add and subtract whole numbers by using the number line.

Show them the number line you made. Tell them that there are other numbers to the left of zero.