All aboard! Kids solve addition problems on a number line using 1, 10, and 100 unit manipulatives.

Kids practice addition and subtraction with manipulatives in this silly shopping game.

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

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

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

Children dig up dinosaur fossils by adding 10 to multiples of 100 in this prehistoric game.

Kids must move fast to find addition pairs that total a target sum within 20.

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

Reinforce your child's three-digit addition skills with this ski-themed learning adventure!

Help Roly get to the party on the other side of the river by solving addition word problems!

Give learners plenty of practice solving addition word problems with this math game!