This is not going to be popular.
Administrators are going to contact me in protest.
My own husband might not approve of this post.
But I'm going to say it anyway: stop the teacher dress code war. If a teacher wants to wear jeans to work, make it okay in your policies. Don't force her to "earn it" as a "prize" or wear a "spirit shirt."
If a teacher can't earn the respect of parents, students, and community, it's not because of her wardrobe.
Also, khakis can look just as sloppy as jeans, so stop saying it's about jeans.
Also, why is polyester the only acceptable administrative fabric?
Teachers, I dare you, give out "poly passes" to the admins in your life. If they do a good job, let them wear their polyester pants on Fridays . . . but only if they wear a spirit shirt.