That First Day of Class!

LEO stands for social and economic justice, sure, but it's specifically an organization of educators, not workers in general. So let's get specific! Let's talk about teaching! Since the Fall 2017 semester begins on Tuesday, September 5, it's time to start planning the first class meeting. Aside from going over the syllabus and perhaps assigning a low-stakes diagnostic assignment, what's an instructor to do?

Please post in the comments YOUR best ideas for a first-day-of-class activity! Please also identify your academic discipline(s) and primary campus.