Here are some helpful websites for teachers!
- http://www.elementarymathematics.org
- http://www.pinterest.com/nbdelta10/
- https://elementarymathematics.org/Kathy_Richardson_AMC_2.htmlhttp://www.insidemathematics.org/index.php/standard-1
- http://investigations.terc.edu/curriculum_clrm/mathpracticestandards.cfm
- https://elementarymathematics.org/Performance_Tasks.html
- http://www.teacherspayteachers.com
- http://www.nctm.org/