the teachers should dress professionally, I was livid when one of the middle aged sex pot first grade teachers at our grade school was wearing shorts and sandals. The other first grade teacher always wore skirts and blouse and a blazer and hose and looked very pulled together.
I don’t think skirts and hose are necessary for children 3rd grade and under as some teachers sit on the floor with the children, clean paint, and do other things that are a little more physical.
A nice pair of khaki pants and tucked in collared shirts looked professional on teachers when I was in school and still looks professional, especially polo shirts with the school’s logo.