Are you looking to fill some time with a fun activity that students will love? This math version of the classic domino game does not teach new concepts but helps students with recognition of various functions, special triangles, and CAST. It can easily be altered to add in comprehension questions periodically (i.e. before a student can win or in between rounds). Best of all - they are engaged and are having fun! It's perfect for that extra 15 or 20 minutes at the end of a class or as a special treat!