Warmup for the first day of classes

The spring semester starts tomorrow, and this term I’m teaching three classes: one I’m familiar with, one I haven’t taught in four years, and another one I’ve never taught. It’s going to be a busy busy busy term.

But then I had an idea. If I could just lecture like this…

…then I could probably finish off the whole semester’s teaching load this week. The students won’t mind, will they?