Education is all about fads and, every few years, seems to lurch from one to another. Some are simply re-cycling, while others appear novel and even random. One which has been around for a few years now, but looks recently to have found a second wind, is that of "data-driven instruction". Based on the extremely reasonable premise of "what works", this mantra asserts that educators should gather data and then make decisions as a result of that (those?) data.
