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?

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SW Notes: This post was begun a few weeks ago...you know, in the break between semesters.
I just got this in the mail, and smug elitist that I am, I thought it was worth passing along.
I'm teaching two classes this semester: one introductory course which is a repeat from last semester and one upper-level course with laboratory, which is a new prep.
So, I hear you are starting your second semester of physics. One of the cool things about physics is that the second semester still uses stuff from the first semester.