Consider the following thought experiment: We include some mechanism in the tablet to inform the teacher in real time about how well his or her pupils are absorbing the material being taught. We free all teachers to experiment with different software, different strategies, and different ways of using the new tool. The rapid feedback loop will make teachers adjust their strategies to maximize performance.
Over time, we will observe some teachers who have stumbled onto highly effective strategies. We then share what they have done with other teachers.
Notice how radically different this method is. Instead of testing the validity of one design by having 150 out of 300 schools implement the identical program, this method is “crawling” the design space by having each teacher search for results. Instead of having a baseline survey and then a final survey, it is constantly providing feedback about performance. Instead of having an econometrician do the learning in a centralized manner and inform everybody about the results of the experiment, it is the teachers who are doing the learning in a decentralized manner and informing the center of what they found.
Pointer from Mark Thoma. Emphasis added.
Read the whole thing. I had never before thought of randomized controlled trials as embedded in a top-down approach to learning. He is suggesting the decentralized learning could be faster. Might the same be true in medicine? And is this also a case against MOOCs?