I had a teacher in elementary school who regularly asserted that I had done things which I had not. She wasn't directly lying: there was another boy who I did

I had a teacher in elementary school who regularly asserted that I had done things which I had not. She wasn't directly lying: there was another boy who I did not get along well with (to put it mildly), and he would regularly tell her lies about things I had (not) done, and she would always take his word because they were German and I was American, even though he had been caught lying about me repeatedly. I was actually referred to social services based on a track record of fictitious misbehavior, and was evaluated by a government psychologist. She was extremely puzzled by the disconnect between my official record and her observations of me, so she pushed to bring the other boy in for evaluation. I don't know the details, but he disappeared from our school shortly after the psychologist evaluated him. Unfortunately, that just made the teacher hate me even more, so while I no longer had someone making up stories about me, every minor infraction was blown out of proportion and reported to my parents with significant embellishments. Bottom line: not only is it a good way to engage with the child, sometimes the teacher really is making false accusations.