Cool Math 4 Kids

https://www.coolmath4kids.com/

This is our brain-training site, for everyone, where logic & thinking meets fun & games. These games have no violence, no empty action, just a lot of challenges that will make you forget you're getting a mental workout!

Math Playground

https://www.mathplayground.com/

Math Playground provides a variety of math topics, from problem solving and mathematical art to real world math and thinking games.

Prodigy

https://www.prodigygame.com/

Prodigy is a free, Pokemon-style math game that features content from each of the five major math strands to create deep engagement so students double their math practice time at home.

Math Game Time

http://www.mathgametime.com/grade

Math Game Time provides free math games, worksheets, and instructional videos that combine the fundamental concepts of first grade math with fun and interactive games that kids actually want to play. Play the games and watch the videos online, and download the worksheets to practice at another time