Get those white boards out! 20 Addition and Subtraction problems. This activity can be done whole class or in stations
To play Mirror:
Kids sit back to back. Each player has a whiteboard and marker. Show the problem and set the timer. When the timer goes off, kids compare answers. If they match AND are correct, they get 2 points. If only one person is correct, they get 1 point. Team with the most points wins!
This product is included in Unit 1 Extending Whole Number Operations 5.3A 5.3B 5.3C 5.3K