Khan Academy has proven to be a huge asset to learners. It has been especially useful in flipped learning.
There have been absolutely no negatives on this one. The videos are professionally done, and begin at the very basic in each content topic area. This is a gift to learners and our society as a whole.
How I Use It
This product has proven to be an asset as it can be integrated easily into a variety of lessons. Students are also able to use this as a tool for individual learning.