Help second graders learn about addition facts to 20 in this online matching activity.

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

Build up second graders’ math knowledge with a diving game about three-digit addition.

What’s the sum? Add 10 to that number in a three-digit addition game for second graders.

Are you ready to add 10 to numbers over 100? Reinforce students’ learning in this ski-themed game.

Get ready to add 10 more! Analyze expressions like "110 + 10" and calculate three-digit sums.