This is a complete lesson for teaching your students how to work with integers, natural numbers, and positive and negative integers. Integers are numbers that don’t have a fractional or decimal part. For example, 3, 5, and -11 are integers, but 3.4, 5 ¼, and -11.4 are not. Natural numbers are all the positive integers from 1 to infinity. Positive integers are all the integers that are greater than zero, and negative integers are all the integers that are less than zero. Positive and negative