I was asked to suggest some ideas for a middle school Math Club meeting and/or MathCounts training.. Here are a few that I like.

1. Domino tilings

2. Mobius strips.

3. KenKen

4. The pairing game

5. Matchstick puzzles

6. Pascal's triangle

7. The subtraction game

8. The diameter and width of a polygon

9. A whirlwind summary of geometry (incomplete) Part A | Part B | Part C | Sols