Repeatedly talking among themselves while I'm trying to teach or demonstrate!
Being a little clique of 2 or 3 off to the side and not interacting *at all* with the other class members.
Refusing to bring any of the requested tools/fabric to class and expecting me to make the best of it. (which I usually do but find it rude and annoying inside myself!)
All that aside, I enjoy classes where there are lots of questions and free interaction.
I want students to feel they have gotten more than their money's worth!
Jan in VA