This document discusses addition and subtraction of integers using two-colored counters. It provides examples of representing integer addition and subtraction problems using red and yellow counters to model positive and negative numbers. Rules for adding and subtracting integers with the same sign or different signs are explained. An example problem about the distance between a submarine and airplane is worked out to demonstrate subtracting a negative number by adding its additive inverse. Finally, an evaluation activity called FACEing MATH is described that has students answer math questions to complete drawings of faces.