I forgot about the 180 blog over the past two days, so don't have a picture, but we have been doing the chain rule in AP Calculus and product/quotient rules in non-AP Calculus. These are skills I really enjoy teaching because there are great ways that you can practice in class.
To include a picture, one thing that my students have seemed to like is that I have been using my iPad as a document projector by putting it on a stand over a table and projecting the camera as I write under it. The excitement of putting your hand under a document projector and seeing it show up on the board is weirdly exciting for a teenage dude. Strange creatures.