Water Rafting: Compose Numbers to Make 20 (Game 2)

First graders practice performing addition within 20 in the quick moving game Water Rafting: Compose Numbers to Make 20 (Game 2). This online math game is a great way to boost children's confidence with adding and decomposing numbers. They'll love racing their colorful avatars down the river and across the finish line while simultaneously bolstering their mental math skills.