Teacher Resources for Online Mathematics Activities:

http://www.syvum.com/online/math.html

This website provides activities for children of all ages to enhance their addition, subtraction, multiplication, division, fractions, algebra, and trigonometry skills.

http://illuminations.nctm.org/ActivitySearch.aspx

This website has over 103 activities for learning and reinforcing mathematics.  Once on the site you choose which grade level you would like to find activities under, the grades range from pre-kindergarten to 12^th, and then activities pop up to help students learn on their own level.  This is a great site with things that fraction models and factor games. 

http://www.enchantedlearning.com/categories/k-2math.shtml

This website provides mathematical activities for children in grades pre-kindergarten through 2^nd grade.  The activities range anywhere from practicing writing your numbers pages, to stories with numbers in them, coloring by numbers, learning about money, connecting the dots, and much much more.

http://www.quia.com/shared/math/

This website provides students with technological games online that can help increase their math learning abilities.  Some of the games include Decimal and Whole Number Jeopardy, Everyday Math Hangman, Place Value Playoff, Solve 1-Step Equations, and the Metric Measurement Millionaire Game.  There are many more games to choose from and each game has a description of what the game is about so the student can pick one that interests them.