integers

1. http://www.math-drills.com/integers.shtml
2. http://math.pppst.com/integers.html
3. http://www.homeschoolmath.net/teaching/integers.php
4. http://educatetube.com/math/basic/math-basic-integers.html
5. http://www.mathguide.com/lessons/Integers.html
6. http://www.wiziq.com/tests/integers