Speak up or let it go?

’m having a tough time deciding if I should speak up about something or let it go...my daughter’s 3rd grade teacher called the kids lazy, said it's depressing they didn't learn the songs she assigned and that they're an embarrassment ... I worked with my daughter to help her understand those aren’t true and we changed them to affirmations... that helped a little bit I’m feeling uncomfortable about that type of language. My daughter is very responsible and takes initiative for all her assignments. She learned some songs but not the whole thing... still I’m curious as to how others would address this. Please- no parent shaming, I’m here to learn and get support