Hello, I'm on a math and physics home study pilgrimmage and what I like the best are youtube-like videos where a physics or math problem is presented for you the viewer to work out while you pause the video, and then the presenter actually goes through the problem step by step. Like the guy at mathtutordvd.com, if anyone has seen him. He's great, but I've already gone through all his videos. You'd think there would be a lot of these around, but actually there are not. The vast majority of instructional video's of, say, the Khan Academy type are simply tutorials on a given topic with perhaps a single worked problem as an example. What you don't get in many of these videos is a problem presented to you to work out first, or better yet a series of problems, and then a step by step explanation and full working through of the problem. Any references/links would be much appreciated. Also, I wasn't sure where to post this so please move thread if in wrong section. I am not allowed to post in the education materials section for some reason.