Give your students decomposition practice by playing games!
You will need: a cup, double-sided red and yellow counters, red and yellow crayons.
Use the cup to shake up the counters and toss them gently onto a table. How many yellow counters do you have? How many red counters? Color them to show how many of each you got.
There is room to play two rounds with 3 and 4 counters and four rounds with 5 counters.