As the ninth grade homeroom teacher, I was reponsible for working with them to prepare something for the program. I asked the other teachers what classes usually do and was told they sing a Christmas song. I get a chorus of painful groans when I ask the students just to take out a notebook or sit in their seats, so I couldn't imagine getting a group of 14-year-olds to sing a Christmas carol in front of the school and parents.
When I asked the principal for advice, she told me she had seen the girls practicing a Christmas dance to "Jingle Bell Rock" so why didn't I have them to that? Both their dance moves and costumes were based on the movie "Mean Girls" and while I did work with them and they kept assuring me it would be great, I still had nightmares of inappropriate dance moves, scantily clad students, and me having to claim responsibility. But like so many other things here, it turned out just fine. The girls practiced a lot (usually during science class, which was fine by me) and we were all proud of how it turned out.
The boys' role was to stand on the side and snap their fingers. Though they didn't do this with too much enthusiasm, they participated and some days you take what you can get. Lots of days in fact.