Presents classroom activities for middle school math teachers to help students get a better understanding of integers, a tool that's necessary for success in algebra. Defines integers and gives real world connections. Uses a number line to review the relationship of positive and negative numbers. Presents a variety of manipulatives that can be used in the classroom. Introduces the concrete model using manipulatives with a mat board. Suggests ways to practice zero. Demonstrates how to record the work done. Provides activities to verify that students understand "zero" and can establish the value of the mat.