This cooperative learning activity is called "Rally Coach". In this activity, two students practice a certain concept. In this activity, it is graphing linear systems. Each student will complete four different objectives for given system. After each person completes their part, they switch papers, check each others work and move onto the next objective. It is a good activity to practice graphing linear equations. It could easily fill 20 minutes of practice time. (Note: The graph in the preview in skewed. However, the graph on the actual worksheets is clear and in-line properly)