My dc is in primary school. My dc has had the same p/t teacher for 3 of their 4 years at the school (another separate issue). She is appalling. No class control, very flaky, unorganised and generally a very poor teacher.
When I found out my dc was having her again this year I made my feelings clear to the head. The head did not disagree with any of my issues and advised there were measures being put in place for a higher standard of teaching.
In a twist of fate, my job involves communication with her, although she hasn't clocked who I am as my surname is different to my dc's. The communication I have had is awful. Sentences that's don't make sense, grammatical errors, punctuation errors. Basically they lack everything she should be teaching my dc.
So, to my aibu....would it be very unprofessional of me to approach the head at my dc's school and discuss just how rubbish her written skills are and how it further supports the fact she is really not up to the job?