This year I will be teaching as a teaching assistant in the second-year course Experimental Physics (just as I did last year). Today was the first day with the students, and it looks really promising. There are, however, a huge number of them (it seems like they ended up being 72, as compared to last year when we only had around 48).
I will be the primary teacher of the numerical math program MATLAB, as well as the typographic program package LaTeX. I will also help in the practical exercises, where the students will be doing different experiments over the course of a full day (they will do three of these experiments), in order for them to write an experimental report/article over it. We will have a lot of reports to correct for them this year..
The course went really well last year, so I hope we will be able to keep the standard again. Because of the large number of students, I ended up making a wiki for the MATLAB exercises, such that they can help themselves more during the exercise sessions. I hope it's actually usable! This first day, it seemed to lessen the queuing for questions a little - so it might have been worth the effort (and anyway, I can use it as-is next year as well).