This document provides examples and non-examples of the concept of "on" using short sentences with images of boys and locations. It introduces the concept of "on" by showing boys being "on" the steps, path, and bench in some sentences, while other sentences show boys not being "on" the bench or steps to demonstrate what is and is not an example of the concept. It also includes some sentences formatted as questions to check understanding of when something or someone is "on" a location.