At times learning Math can be a frustrating experience for students. It becomes especially challenging in middle and high school. The Khan Academy is a non-for-profit organization that provides free education for anyone anywhere. The library of 2,700 videos covers K-12 Math, Biology, Chemistry and Physics. Each video is approximately 10 minutes long.
Sal Khan is a natural teacher and holds three degrees from MIT and an MBA from Harvard. If you have a child in middle or high school they would find the Khan Academy very useful. Below is a video I found that explains the mathematical concept of place value.