Teacher help...?

Sounds like she has high expectations for you because she knows that you are smart. You should participate in cl and smile and say "good morning" ...I would kill her with kindness in hopes she would eventually come around. It doesn't sound like her attitude is affecting your grades, wh ich is good. Some teachers are just bullies, but if she is singling you out, again I'd bet that she just has very high expectations of you over some of the other students.