Bazinga - an awesome review game for most any subject and any grade. Students are in teams, I ask questions, and the students answers them. If a team is correct they have the chance to pick a Bazinga Card and we do what it says (e.g. double your score, erase 1 point from another team, switch the team captain of the winning team with the team captain of the losing team, etc.).
The Pi Episode: Math Bites with Danica McKellar. This would be a great video to show on Pi Day, March 14th. It is about 6 minutes long and entertaining and it also stars Winnie Cooper (I mean Danica McKellar). Make Middle School Math Pi Day an event at your school.