To help Roly move through obstacles, kids learn a regrouping strategy to make addition within 20 easily!

Kids solve two- and three-digit addition problems by regrouping in order to help the Professor grow out his beard.

Kids practice borrowing in this two-digit subtraction mountain-themed game.

Kids mix up a potion to help Professor Beardo grow out his beard, and practice place value, in this multi-digit addition game.