How do I approach my daughter's teacher?

My daughter has been going to her preschool for over a year now. She started in the 2s room and once she was potty trained, she moved up. Her new teacher is a bit more firm, which is completely fine, as my daughter needs to hear from someone other than my husband and I. Well, my daughter is intimidated or afraid to answer wrong (when asked to tell her letters/numbers). My daughter has basically shut down when it comes to that. My daughter is strong but very sensitive. I have a feeling, my daughter isn't taking to her teacher and will cry and stop herself. I don't want to be rude to her teacher but how would you tell her: she's having a hard time because she's intimidated by you and she's not going to get much out of her? I don't want her to stop herself from learning plus there aren't any other classes since it's a small school. Side note, I have been doing letter recognition and she actually gets it. I know I'm her mom but she can be super comfortable yet stubborn at the same time.