Should teachers have a dress code? Honestly, teachers need to dress professionally. But to have an extremely enforced dress code is a bit too much. I think teachers and students should have the same dress code. To be sent home as a teacher to change your clothes? Too extreme. If I was an adult, and I was sent home to change my clothes over something silly like wearing a blouse without a collar, I'd laugh in their face. If the students can't wear tank tops or shorts/skirts higher than their finger tips, then neither should the teachers. The students are forced to change into a set of clothing given to them but for a teacher to have to change? That's too much. As a teacher, you should know how to dress. If you come to school exposing undergarments then you don't deserve to be a teacher. Student's are supposed to respect their teachers. Coming to school dressed inappropriately doesn't earn you respect. I don't see the problem with a teacher coming to school  in a button up shirt and blue jeans. As long as you look respectable. Respectable as in decent, casual, comfortable, church clothes as I like to call it. Nothing like sweatpants and flip flops. Jeans, slacks, a nice blouse or a button up/collared shirt. That states you're a respectable, fun teacher who enjoys their job enough to not overdress. Pantyhose and heels are unpractical for our Southern California weather. Over all, teachers and students should have the same dress code.
http://www.usatoday.com/life/2003-08-20-dress-code_x.htm
http://www.cta.org/en/Professional-Development/Publications/2012/09/September-Educator-2012/Dress-Code.aspx