Lining up for Recess/Lunch

My teacher does a really neat, easy, simple thing for the students when they line up. She has them line up in two lines, a boy and girl line. She has put little strips of masking tape on the floor labeled boys and girls. They always line up the same way and it really makes transitions in and out of class nice and easy. For lunch there is a lunch order the students have to line up in every day. They are always in the same order for lunch. I think that is a school wide thing, but I loved the simplicity of it.