In January 2013 I consulted as an Arduino tutor at the Glasgow School of Art. I provided some refresher tuition and project guidance for 3rd year Product Designers there. The teaching materials are viewable here.
The project the students worked on was based around sound, and there were some great ideas being worked on. Most involved PIR sensors triggering sounds from a laptop (despite my attempts to discourage this for the absolute beginners). We mostly did this using the keyboard hack I described here. My favourite projects as ever were the mechanical ones however..