[EricH]

How about this: sometime during the summer, see about having a team meeting. Express your concerns with the new teacher; allow the teacher to do the same as she may have a different set of concerns about you guys. Work out some form of compromise if needed. Just make sure to do it as a team, possibly with some non-directly-involved member of the administration as a cool head in case of trouble. (Also to represent the administration if need be--they have a stake in this too!)