Group 1 –
Spread the cups out and have your students seated around them.
As quickly as they can they need to stack 6 random cups in a pyramid, then collapse the pyramid so they have a stack of 6 cups. The first person to read the 6 digit number the stack makes, wins. To get all participating and keep the motivation going, you can give the first person 2 points, and everyone else in the group that reads their number correctly 1 point.
Create factor rainbows for 60, 72, 108, 144
(Mrs Joyce) Factor Rainbows