I spotted this ASCD News item about a first-year teacher who uses YouTube videos of his own lesson to reinforce instruction.  I highlighted a few sentences that might capture your interest. 

Lately my thoughts have been increasingly directed toward the role that technology will play for learners in the next decade.  During my recent trip to Washington I heard an assistant to the Secretary of Education discuss an interesting piece of research.  He told the audience that the average number of times that a student in this study watched an online Algebra I lesson was seven.  As a teacher, it is fascinating to me that it takes some students seven viewings to comprehend something; but not as surprising when I see myself as a learner.  Forty minute classes neither afforded me such an option when I was a student nor when I taught.

I believe we will be reaching the tipping point in the near future when lessons will be commonly supported with online content and exercises that expand our lessons beyond the classroom.  I know that some of you are already moving in that direction using Moodle and other resources.

Math comes to YouTube at Palmyra Area Middle School

By BARBARA MILLER, The Patriot-News

February 11, 2010, 8:04PM

Tyler Binkley’s math videos might be getting more views than the latest silly pet trick or teen idol on YouTube, at least among the sixth-graders he teaches at Palmyra Area Middle School.

Binkley, a first-year teacher at Palmyra, knows that the idea of creating math problem videos on YouTube is something that would connect with his students.

Sixth-grader Kate Sanborn said she likes the animal videos on YouTube, but now watches Mr. B’s math videos "to help me get a good grade. I think all of them are really helpful."  "If I don’t understand something I go on the Web site, and I stop it and try and do the problem. Then I see how he did it to get the answer," Paige Wible said. "They’re like a little skit," Abby Alger added. "But they’re serious because they’re teaching you stuff."

It’s the first such use of YouTube in the district, said Collene Van Noord, assistant superintendent, although there are other sites, such as TeacherTube, a similar service for teachers.  Since YouTube is blocked at school, students have to view Binkley’s videos at home.  "The best way to reach the kids is what they love to be on. You gotta utilize whatever they’re using," said Binkley, who hopes to create a whole library of math videos on YouTube.

While less common in K-12 schools, higher education has been using YouTube EDU for some time to post courses online for students, said Chris Dale, YouTube spokesman. "The idea is students can learn anywhere, anytime with these new devices rolling out all the time," said Obadiah Greenberg, who directs YouTube EDU. "In general we are seeing a movement of teachers who are starting to understand the power of video to communicate. Students want to learn anywhere, anytime. This is a powerful way to do it."

Palmyra Area High School principal David Jones said using the technology is a must.  "It’s the world where they live," Jones said. "This will be the last generation of teachers who will decide if they use technology or not" since students and parents will demand it.  Parent Dawn Blauch said her son has used the math videos quite a bit. "It’s a good way for parents and teachers to work together," Blauch said. "It gives parents an extra tool at home."

Chris O’Neal, an educational technology consultant and former blogger on the topic for Edutopia.com, an educational web site funded by the George Lucas Educational Foundation, said there quite a few teachers posting lessons on YouTube nationally.  "Teachers are telling kids if you don’t get it now, you have a chance to review it on YouTube after school," O’Neal said. "It’s a nice extension of what they’re doing in class.  It’s also kind of a way to meet kids where they are" in the world of social media

PostScript:  Here are two other sites that I found interesting:

http://www.gse.harvard.edu/blog/news_features_releases/2010/01/repetition-repetition-repetition.html