[Sincerely Yours ♥]

I work at a high school, but I don't have a professional dress code because I'm only part-time. I follow the students' dress code though & avoid anything too short, too low, or too thin of straps.

I do work with a student-teacher though. He usually dresses professionally, like wearing slacks & a nice collared shirt. But then again, he's a guy.

For you, I'd recommend staying within their dress code. Definitely no spaghetti straps or bras showing. Skirts should be within their dress code just to be safe. Make sure not to wear anything with inappropriate brand names or designs as well. If in doubt, definitely ask him to be sure.