Sal Khan: Let's use video to reinvent education

TED 2011
Sal Khan: Let's use video to reinvent education (script)
Summary
In fact, using YouTube videos is better to review a lesson, because You can pause and repeat, when you want to do without feeling like your teacher is wasting her time. You'll be embarrassed to ask her teach you something old. If you're bored when you watch it, you can go ahead and you can watch at own time and pace. The speaker said that probably for students or you, "Do you understand this" will be the last thing they hear.
He put the YouTube video in which he was teaching math up as just kind of something extra and a supplement to review for his cousins.
However, he was heard that his videos are used in the classroom in some schools somehow. It sounds strange. Why the teachers don't use it in the classroom but they let students watch it at home.
It turned out that the students can study with self paced and by removing the usual lecture from the classroom, the teachers and students are able to have time to discuss and interact in the classroom. Additionally, the students can teach each other, someone who can't go to school can study at their home when they can do.
The speaker believes that by using technology, the classroom can be changed humanize. It should be used by more people in the world to reinvent education.