Develops the historical background for positive and negative integers and uses several models including the black and red chips model to illustrate the four basic operations on integers.Subsections: Positive and Negative Integers; Uses of Integers; Models for Integers; Addition; Subtraction; Multiplication; Division; Inequality; Properties of Integers; Mental Calculations; Estimation; Problem-Solving Application. One-page Math Activity: Addition and Subtraction with Black and Red Tiles.