Kindergarten:
1st Grade:
http://coolsciencelab.com/math_magic.html
http://snowflakes.barkleyus.com/
2nd Grade:
http://coolsciencelab.com/math_magic.html
3rd Grade:
http://coolsciencelab.com/math_magic.html
4th Grade:
http://coolsciencelab.com/math_magic.html
5th Grade:
http://coolsciencelab.com/math_magic.html