Please don't ever ask me to bet on which topics will be "hot" and which ones not. I managed to blog about an experiment in evaluation (y-a-w-n, so I thought!) during the week our new site was down several times for repair and then when I was off the grid, on my big one-week-of-vacation-fun of the year. Off the grid. I thought posting what is basically a revised version of a very successful course I taught last spring, "This Is Your Brain on the Internet" was a respectable place-holder during absence (www.hastac.org's and my own). I threw in some new ideas about experimenting with grading methods almost as an afterthought. About 5000 views and dozens of comments later, well, I get it now: Grading is a hot topic! Here's why . . .