Sunday, September 2, 2012

Coursera TED talk--Daphne Koller

Lately I watch TED talks on a tablet, a Nexus 7, in the morning while walking quickly up and down stairs; it's 20 minutes of reasonable exercise for body and mind, and all that. This morning I watched That's Stanford CS prof Daphne Koller's talk on Coursera. Of course Coursera is higher education, but the techniques can certainly be applied to K-12.
  • she wants to have lectures by the very best lecturers, broken into 8-12 minute conceptual units with students having to answer a question or two at the end of each unit (sounds like KhanAcademy or TED-Ed, so far).
  • She wants personalized lectures, at least in providing optional units
  • She also wants to have actual course scheduling, with tests and deadlines
  • She wants peer grading, which apparently correlates extraordinarily well with teacher grading except that it's faster (22 minutes??), and it scales for huge courses
  • She wants students to (usually) form study groups, both virtual and physical
She notes that personalization in this context can in several ways go farther than a physical classroom can offer, and it's not just choice of options; if 2% of your students share a misconception that causes them to get the same two test questions wrong in the same way, then as a classroom lecturer you'll never know, but as a MOOC (massive open online course) lecturer with 100,000 students, you'll see 2,000 students as one point on a graph and you can cause them to be automatically directed to the same extra units.
She also talks about the 2-sigma difference between (A) students who try to learn just from lectures, versus (B) students given individual tutoring. 98% of group B are "above average", if the average is set by looking at A. She thinks that personalized courses can come closer to B than to A.
I don't see anything there that doesn't work for K-12, except that you need to provide more physical supervision/security. (Well, I've known some small kids I would trust alone or even, maybe, in a group, more than some college-age students, but usually you need to provide more physical supervision/security.

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