When my granddaughter was ready to start doing her student teaching and going on interviews, she needed something besides her college wardrobe of jeans, pajama pants, hoodies and hoochie-mama party wear. When she was home for Christmas, we went to my favorite large thrift shop. Less than $60 later, we walked out of the store with SIX big bags full of dressy/office pants, skirts, tops, suits, and a dressy coat. Everything was in excellent shape and most of it was "designer" wear. I think she was the best-dressed student teacher in South Carolina.
So, what does she get to wear to teach now? Jeans, sneakers and hoodies/tshirts. She teaches middle and high school science, biology, chemistry and physics at a private school and it's very, very casual there, students and teachers alike. She still hits the resale shops.