I subbed today for a band/digital media teacher. I was split between two buildings, middle and high school.
My first class of the day was simply, "Guitar." The first part of the lesson involved putting on a CD, and the kids had to play along to the music. It took about 10 extra minutes to get started, because the teacher had removed the usual speakers to the sound system and I had to sort through a mess of wires to route the CD player to other speakers.
One of the songs on the CD was Johnny B. Goode. Just before I started the song I said, "alright guys, pretend you're Michael J. Fox and the year is 1955." Not only did no one laugh, no one seemed to even get the reference.
Also, schools, if you decided that your students can not handle having doors (or even full walls) on the bathroom stalls, please don't make it so you need a key to get into the staff restrooms. This makes things pretty awkward for "temporary staff."