okay, and why are they doing this in a church?
Traditionally, there was a certain religious element to the event. It's not like I'm going to piss holy water on you religious or anything. Sometimes the baccalaureate is accompanied by a mass, too, but I'm not sure everywhere does that.
I remember when I graduated from my public high school, there was a baccalaureate at a local church because of the whole no god in public schools thang, whereas for my private school peers, it was an in school dealio.
I really don't know much about it. It's a tradition thing.