This is a general math/science website. It is very useful site for conversions. http://www.factmonster.com
This is a help resource for 4th through 8th grades. http://www.mathleague.com/help/help.htm
This site lists all of the district's links to math related pages. http://www.dallassd.com/resources/Teacher%20resources/links/math.htm
This site has the ability to quiz students in specific areas. For example, you may take a quiz on the metric system. http://www.aaamath.com
Math games. http://www.mathsisfun.com/games/connect4.html
This is an interactive site that deals with skew lines. http://mathworld.wolfram.com/SkewLines.html
Site for practicing basic facts. (add/subtract/multiply/divide) http://www.aplusmath.com
Compass Learning Odyssey http://odysseypk8.dallassd.com