http://gregtangmath.com/satisfraction

https://cuacs8.mck.ncsu.edu/mathsampleitems/main.html

https://www.splashmath.com/fraction-games-for-5th-graders

http://calculationnation.nctm.org/Login.aspx?ReturnUrl=%2fGames%2fdefault.aspx

http://www.mathgames.com/standards/

http://maccss.ncdpi.wikispaces.net/Elementary

http://www.xpmath.com/forums/arcade.php?do=play&gameid=118 (games for practicing volume)

https://www.prodigygame.com/   ( Class Code: 6E8EAA )

Estimating placing fractions on a number line 

www.freckle.com   ( class code: AXKUUH )