One nitpick: They talked about the "zone-out" button, which students are supposed to press when they've zoned out of a presentation. There are two show-stopper

One nitpick: They talked about the "zone-out" button, which students are supposed to press when they've zoned out of a presentation. There are two show-stopper problems with that. One, having zoned out reasonably much in my undergrad career, I can tell you that zoning out is not something that hits a threshold, and then you realize "I've zoned out." That is, unless you're consciously zoning out, in which case you consciously aren't interested in the material, in which case you would never press the button, since you don't want the professor to get mad. Two, that assumes that everybody has a laptop (generally, only 20-50% do), AND, even less plausibly, that they're all looking at the professor's presentation with their browsers. (probably 1% of all undergrads would ever do that)