Students work in groups to develop a chapter for a math textbook that will teach other students how to do a specific mathematical skill (a particular standard). Students must come up with a list of prerequisite skills necessary for learning the new skill. They must explain, define, demonstrate and assess the new skill. Therefore, they will be writing explanations, problems, quizzes and answers. After a chapter is completed, it may be distributed to other groups for feedback and can be used as a real teaching tool for students who have yet to learn the researched skill.