In the show, the main girl's bathroom is called "The Novak" which holds all the pictures of the homecoming queens. The name is inspired by when movie stars would donate money to schools (often an alma mater). The writers found out that 'Kim Novak' actually did donate money to a school in the Santa Monica area (where the school/show is set), so they named this room after her.
Do we have to do those splits? I'm a Christian.
Throughout out the series, it's clear that the actors/actresses portraying teenagers are actually in their 20s+. This is done as to not interfere with the schooling of real teenagers and to give the general viewing audience who are teenagers themselves someone they can look up to.
Due to licensing costs, some of the songs originally featured on the soundtrack of several episodes have been replaced by less expensive tracks (or no tracks at all) on the DVD release.