MathTV

[Daniel Y.]

http://www.mathtv.com/

A series of videos dedicated to improving understanding behind the mathematics of Algebra, Trigonometry, and Calculus. Hope you find them as useful as I have.

[Kurdt]

I like Molly S.

[Greg Bernhardt]

This looks really fantastic, thanks Daniel!

[liberandos]

Wow, they have worksheets available too. I saw their youtube (youtube.com/mathtv (http://youtube.com/mathtv)) site that had a link to a free trial, for the worksheets, that is.
go to the old login page

http://mathtv.com/members/welcome.php

and use the free trial that never expired:

user: guest01@mathtv.com
pass: exp0307

The algebra 1 section has quite a few useful worksheets.