This is a lightly edited repost of instructional material from May of 2017. It has a little more universality and a little less class-specific feedback.
Shrapnel
The focuses of this instructional post are in-class focus and feedback. The impetus is that it is never too early to warn you against straying from the path. We shouldn’t wait until the spring to discuss poor decisions; we should talk about it now, at the end of the first week, before any bad habits metastasize. The worst habits, like wasting class time and ignoring instruction, will slowly poison you.