I've been known to text in class, such as in my giant lecture class on Ethology. He'd put all of the notes up on the first day, for the whole semester, and tests came straight from there and the book. It was a 3 hour night class, and I only went to see the relevant movies and to talk to the professor. I texted a lot in there, the teacher knew, and used me as an example of turning in a perfect research project.
In another class this semester, there are maybe ten of us students in the class. The teacher knows I text, but I'm also one of the most involved students in class discussions, and talk to her before and after class, so she doesn't mind. I also multitask on my laptop, such as now. I sit in the very back, corner closest to the door in all classes. (Health problems mean I need to leave often, and it's less distracting.)
However, time to leave greekchat to take notes