You can also use the video as your own online textbook, following the videos and exercises in order. You would need to purchase a workbook or find worksheets to go with it though.
There are ads on these videos, but you can pay a reasonable subscription fee for an ad-less version. I don't mind looking at ipad commercials though. The paid subscription includes the ability to download videos for later use and the ability to make the videos full screen.
Subjects included:
Basic math
Pre-Algebra
Algebra
Geometry
Advanced Algebra (II)
Trig/Precalc
Statistics
Calculus (1,2,3)
Beyond Calculus
College statistics
Linear Algebra
Differential Equations
Discrete Math
You will have to become a member (free) to use the site. Great for middle school, high school, and college.