Awesome work, Pete. I’ve followed what Khan did for math, and I feel most of us could benefit from flipping our classroom at least periodically. Your generosity in creating this site shows the commitment you have to education’s purest goal. Reply
chemdoctor 
The 3rd vid was taken on my desk
Awesome work, Pete. I’ve followed what Khan did for math, and I feel most of us could benefit from flipping our classroom at least periodically. Your generosity in creating this site shows the commitment you have to education’s purest goal.