Hi,

Education.com offers some resources for helping your child with math:
http://www.education.com/topic/academic-subjects-math/
http://www.education.com/activity/all-grades/math/
http://www.education.com/worksheets/all-grades/math/

Here's a math homework help resource from Discovery Education:
http://www.education.com/e-learning/math-homework/

If there are particular math challenges that your child is struggling with, please add more information to your question to get the best suggestions from members of the JustAsk community. Info to consider adding: your child's grade, the type of math he or she is struggling with, and what you are seeking in a math website (online tutors? software you can download? worksheets?).

Thanks for asking!