Domain and Range group work with Precalc h. Interesting misconceptions when they tried to graph y=log(x^2) on their TI. The calculator badly screws up the graph by not showing enough detail around x=0. Many, many, groups thought the range was bounded below (the number varied by the group).
Side note, gave he students the option of sitting with whiteboards or standing. All but one group chose standing. 🙂