Commutative Property of Addition. Check out this board School Creativity for a variety of classroom ideas.
Zap It...a game I learned in grad school. Put high frequency words on sticks (these are foam sticks) and write zap it on a few sticks. The kids pull sticks from a container and read the words. If someone gets Zap It, all of the sticks go back in the bin. Great word work #daily5
Half and Fourth cut and pastes -- common core math standard!
Math Puzzle! Such a fabulous idea.
Roll, Cover and Add FREEBIE
Part Part Whole practice