Math Online Tools, K-12

Interesting Web sites for teaching math...
The Maths Apprentice
This is a primary and middle school site for mathematics directed at the younger audience.

Kids Online: Me and Mymaths
This is a primary and middle school site, but a useful math site.

Dan’s Maths
This site is directed at the more senior school audience but is still applicable to middle school students.

Video tutorials and resources for mathematics

US Government Data
This is a great source of accurate information and statistics. Applicable to mathematics, humanities and many other subject areas.