Having a hard time explaining why -7 – (-10) = 3? Do your students get confused with integer computation? Instead of teaching your students two negatives make a positive, try this lesson and you will find that students will be able to solve any integer addition or subtraction problem correctly, and then be able to understand multiplication and division of integers. The objectives of this lesson are for students to identify an integer represented by a point on a number line, order and compare integers using a number line, identify and describe the absolute value of an integer, add and subtract integers on a number line. This lesson includes practice sheets for using the number line for both addition and subtraction of integers.