The unit Integers covers all the important integer topics for middle school (grades 6-8), with instructions written directly to the student, so it requires very little teacher involvement.Integers are introduced using the number line to relate them to the concepts of temperature, elevation, and money. We also study briefly the ideas of absolute value (an integer’s distance from zero) and the opposite of a number.Adding and subtracting integers is presented through two main models: (1) movements