It's back to school time and there is a fantastic resource online to tutor or even teach students at their own pace.
Sal Khan delivers 70 thousand mini lectures a day.
Cited as the most watched online learning online.
From simple addition you can go at your own pace all the way to advanced calculus.
It's good enough for Bill Gates to have his 11 year old to soak up videos from algebra to biology.
Best of all, it's Free.
So check it out, search, play, pause and fill in the blanks at your own pace.http://www.khanacademy.org/frequently-asked-questions