This document discusses differentiating instruction by content. It provides examples of ways to differentiate content, such as by assessing students' skills and knowledge to match them with appropriate activities, allowing student choice in topics, and providing basic and advanced resources. It then lists several educational websites teachers can use to find lessons, activities, and other materials to differentiate content according to students' readiness levels, interests, and other variables. Teachers are instructed to choose a lesson to teach and search one of the websites for ways to differentiate the content.