It is worth reporting (since this newsletter has a reasonably wide readership) once again that the famous 'cone of experience' is a hoax. I've seen it debunked in several places, and on several mailing lists, over the years. But still it persists - it shows up in academic papers, education guru seminars, and now, most recently, on Wikipedia. Showing, I guess, that nothing is immune. Anyhow, Will Thalheimer has a good set of links showing where it appears and, if you scroll down, giving it a thorough debunking.