The NBA is working on something truly splendid. A video rulebook. The idea is that, eventually, there will be an online, multimedia showcase of what is legal and what is not. It will help to settle many an argument.
Until that’s ready, there are all kinds of video clips available and the NBA uses them all kinds of ways. As part of ongoing training, the NBA recently sent referees a series of clips showing different kinds of travels.
The idea that a teacher could call up a gallery of, short clips of say, “classroom dialogue” or “authentic questioning” or “silent, sustained reading” — examples both good and bad — probably shouldn’t seem like the vainglorious pipe dream it does to me right now.