This math game is exactly what the teacher wants: 1. Fun 2. Effective 3. Easy 4. Free The purpose of the game is to help your students learn their math facts fluently. I always start my 2nd graders out memorizing their doubles (sums to 20) with this game and then it morphs easily into doubles plus one facts, and then onto the real toughies (7+9, 8+6, etc.). Directions: 1. Use