This is a great hands-on way for students to understand proofs. There are six triangle congruence proofs included. All "pieces" of the color coordinated proofs can be cut out. Students work to rearrange the statements and the reasons in the correct order. As students complete each proof, they move on to the next one. Students can work in groups of 2-3, or they can work on their own. The students really like this one; it is great to see the concept start to click!