Math Gametime: http://www.mathgametime.com/
Fun for the Brain: https://www.fun4thebrain.com/
Cool Math Games: http://www.coolmath.com/
Math Playground: http://www.mathplayground.com
AAA Math: http://www.aaamath.com/
Math Magician: http://www.oswego.org/ocsd-web/games/mathmagician/cathymath.html
multiplication.com: http://www.multiplication.com/games
Math-Play: http://www.math-play.com/8th-grade-math-games.html
Algebra for Children: http://www.algebra4children.com/seventh-grade-math-games.html
Math Games: https://www.education.com/games/second-grade/math/
Turtle Diary: https://www.turtlediary.com/
Lightbot: http://light-bot.com/hocflash.html
Engineering.com: http://www.engineering.com/GamesPuzzles/tabid/82/Default.aspx
BrainPop: https://www.brainpop.com/games/game-finder/?subject=Technology
NetSmartz: netsmartzkids.org/games/
Run Marco: https://www.brainpop.com/games/runmarco/
Code Monster (recommended for ages 9 - 14): http://www.crunchzilla.com/code-monster
Code.org: https://code.org/learn
Blockly: https://blockly.games/
NetSmartz: https://www.netsmartzkids.org/games/
Toy Theater: http://toytheater.com/
Arcademics: https://www.arcademics.com/
Highlights: https://www.highlightskids.com/games
Seussville: http://www.seussville.com/#/games
Cookie: http://www.cookie.com/kids/games/viewallgames.html
Primary Games: https://www.primarygames.com/
ABCYA: http://www.abcya.com
Free Rice: http://freerice.com/#/english-vocabulary/1393