Originally Posted by Carleen
Apparently it was originally written as a movie..
I had not heard that! Where did you find that out?
I imagine, if it's not completely scripted at this point, they do at least have a general outline of where the show is going to progress. As you mentioned, if it had originally been planned as a movie, they would already have an ending thought out, but if it's meant to be series, they might only have a few rough ideas and need to see where the show takes them before they can put together a fitting end. Because even if these kids graduate and move on, the plus side of being cast at a "high school" is there is new students coming into the picture as well.