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

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

Kids practice adding and taking away 10 in this silly game show.

Add 100 to three-digit numbers and find the matching sums in this exciting Dino Fishing game.

Find the sum of 12 plus 8 and other combinations that make 20 in this online diving adventure.

Ask your child to practice adding up to 10 and breaking down math equations in this math race.