Pre-Algebra: http://www.math.com/homeworkhelp/PreAlgebra.html
Pre Algebra: http://www.phschool.com/webcodes10/index.cfm? fuseaction=home.gotoWebCode&wcprefix=adk&wcsuffix=0099
PurpleMath: http://www.purplemath.com/
PurpleMath Forum: http://www.purplemath.com/modules/index.htm
Math U See: http://www.mathusee.com/prealgebra.html
Virtual Math Lab: http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/index.htmCoolMath/
pre-Algebra lessons: http://www.coolmath4kids.com/
aaaMath: http://aaamath.com/
Discovery Channel: http://school.discoveryeducation.com/homeworkhelp/math/math_homework_help.html
Algebra I : http://my.hrw.com/ check with your teacher for the user name and password
AlgebraHelp: http://www.algebrahelp.com/
WebMath: http://www.webmath.com/
Elementary Math
Math Play ground: http://mathplayground.com/Cool
Math: http://www.coolmath.com/
Math for kids: http://www.tooter4kids.com/classroom/math4kids.htm
Perfect the Art of Math: http://www.mathforkids.com/