I had a similar situation with my son's AP Psychology teacher who was teaching that there was no such thing as bipolar 2. I provided some links to some reading material, but it was pretty much a lost cause. The frightening thing was that she was an AP teacher. ACK!

My oldest is quite familiar with the characteristics of bipolar disorder. I've just been really straight with him. At 14 you should be able to provide some reading material for your daughter and have a straight talk about it. It's not like she doesn't know something's up. Trust me; she already knows.