Mathematical Practice 3: Construct viable arguments and critique the reasoning of others.
Use this sheet over and over each unit as a review or test reflection!
Be creative! Give a topic/theme to the problems in each mystery (see preview). As the teacher, choose problems that are your students' most common mistakes. Solve each problem twice - one answer is correct and the other answer is wrong (like 'My Favorite No'). Students must analyze both answers and solve the case. Room for answer + written reason.