With end of the year testing, more and more teachers HATE putting up and taking down their educational posters and reference material. However, administrators expect to come in your room and see it up on your walls.
Now, I can't take credit for this fab idea...one of my fab team-mates does this in her room. I got out all my educational posters and hung them up with clothes pins. I grouped the posters by subject and in an area where they could be used for reference. For example, my science posters are around the science bulletin board and I will change them with the unit.