The most common reason for assigning homework is to have students practice information covered in class to reinforce learning and promote mastery of specific abilities. The material that will be covered in future lessons is introduced through preparation assignments. These exercises are designed to assist students in getting the most out of new topics and concepts covered in class. The transference of previously learned skills to new contexts is the focus of homework. Students might, for example, learn about the circumstances that led to the French Revolution in class and then be assigned homework to apply what they learned to the American Revolution. Finally, integration homework asks students to combine previously gained skills into a single product, such as book reports, science projects, or creative writing.