For Teachers :)

http://www.math.com/

http://www.jumpstart.com/parents/resources/math-resources

https://xtramath.org/

http://nlvm.usu.edu/en/nav/vlibrary.html

http://www.k-5mathteachingresources.com/

 These websites have great ideas for teaching math lessons in the class. They have tips and games to use in the classroom for teachers. There are great lessons on these websites!