Ohhh. I’d have issues with the teacher then! If there were no suggestions as what you can do, because your Dd does have the skills to do these things, id maybe ask the teacher if the principal had some suggestions!
Maybe have a sit down with them. To me...this is subtle bullying!
If there’s no academic reason for the letter to be written I’d be pissed!
Very passive aggressive behavior on the part of the teacher!