Check it out. Do it now - or immediately after you finish reading this post, anyway.
This really smart guy who lives on the west coast wanted to help his nieces and nephews on the east coast with their homework, so he started recording these really simple video sessions explaining math and science concepts. Here's the magic: it's just his voice explaining while you see the formula or whatever being worked out.
These are incredibly helpful, and they are more and more useful as I progress through high school.
I read that some schools in California were switching the lesson plans around, assigning for homework the Khan Academy videos to introduce and explain new concepts, then using class time to work on what would have been the homework problems.
This is important. Go check it out here
