In this activity, students work with groups of 3-4 on Ratios and Unit Rate Word Problems (Common Core Based). They are to work together to PROVE the given answer choices are CORRECT or INCORRECT. They are given a certain number of points for using their resources (notes, book, classmates) and NOT asking the teacher, for having topic related discussion, being actively engaged, and having the correct proof. While walking around, if the teacher sees they are NOT following the above mentioned rules, points are deducted. The group with the most points left over at the end of the activity wins a prize. Questions are from our SchoolNet and BigIdeas Programs. Activity is mine.