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.

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

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

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

Add one and find the sum! In this game, children practice number and pattern recognition skills.

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

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

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

First graders hone their addition skills of adding one more with this water rafting math adventure!

Take a deep dive into the addition strategy of adding one more with this underwater math adventure!

Learners hone their two-digit by one-digit addition skills in this underwater race to sunken treasure!

Kids practice recognizing addition patterns as they match equations to their correct answers.

Kids practice concrete counting and simple addition at the pizza parlor.

Play this snow-themed game, in which students practice using patterns to add within 10.

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

Practice essential first grade addition skills in this river-themed math game!

Children practice adding two-digit and one-digit numbers to dig up fossils in this math game.

As students practice adding one-digit numbers, they will move their character to the finish line in Ski Racer: Addition to 10.

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

Children use their mental math skills to determine which equations add up to 20 in this math game.

Children flex their mental math muscles as they try to quickly find the equations that add up to 10.

In this energizing math game, think about how different numbers can add up to 20.

Help young learners identify the correct fact family equations in this exciting addition game.

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

In this water rafting adventure, children will be asked to choose the equation that adds up to 10.

Which number is missing? Click on the number that fits each addition expression and win the race.

Children use their addition knowledge to complete equations in a race to reach the sunken treasure.

Children race down the river and across the finish line by choosing the equations that make 20.

Compose numbers to make 20 and build first grade addition skills in each round of this online game.