I will be adding to this list from time to time as I am introduced to other great sites.
- www.khanacademy.org - A huge collection of Math and Science tutorials. Created by an MIT graduate this site is a terrific resource for students and teachers. The videos are hosted on Youtube so Youtube access is required.
- www.mathtrain.tv - a collection of math tutorial videos created by students for students.
- http://teacher.tenmarks.com - math video lessons - free. They have loads of math video lessons - 3-5 minutes long - perfect for sharing with kids and parents for grades 3-10. What I like most is the wonderful way they have explained complex math problems by breaking it into smaller pieces.