Classrooms are not sexy, but they work. The glassy look rich people get in their eyes when I tell them that Crash Course is used in tens of thousands of schools is actually marvelous arrogance. It’s that look of a person who thinks that, if only they were in charge, they could fix this mess. Because, of course, the people who are currently in charge don’t know anything about the problem. They’re too entrenched, too old-school, they can’t think in terms of disruption.