Students love being active participants in their learning. Through this activity, students will not only get to choose what problems they complete, but also complete problems from several different difficulty levels. Students must earn a total of 20 points (stars) in order to earn credit for the assignment. But wait, there's more! Students must complete at least one problem from each color category, and at least two problems from each point (star) level. This ensures that even with choosing their own problems, they complete problems from a variety of difficulty levels!