DEAR HARRIETTE: My child has duped me, and it doesn’t feel good. She has always been an excellent student — up until this semester. One class in particular has been tough for her, and her grades reflect her struggle. I have asked her about it repeatedly, including trying to find out if we should get a tutor to help her do better. She has shrugged off all of my suggestions, but the grade has stayed the same. She says she hates her teacher.