As the war goes on, how are the changes in the trench similar to the changes in the soldiers?

Have you ever heard the phrase “two steps forward and one step back”? While playing a board game, have you ever moved forward only to find that you were then directed to move two or three squares back? Adding on a number line can be just like that.

Note: Many screens in this lesson have audio. Use headphones or speakers.

Gather the listed materials.

The Student Guide contains important instructions and the assignments for this lesson. Be sure you have a copy of it before proceeding with the lesson.

As you work through the lesson, use the Student Guide to take notes and solve problems. Your Student Guide will be a valuable resource when it is time to prepare for tests.

In this lesson, you will learn to use the number line and algebra tiles to add positive and negative numbers.

First, review identifying points on a number line.

Go to the next screen to begin.

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