You could always get the class involved and do a re-creation of a battle school battle. Of course, you'd all have to pretend that you were in zero-gravity...but, then again, if I remember high school correctly, most high school students could use a reminder that having an imagination is a good thing.
On the other hand, you
are in Florida. Any chance that you could contact NASA and borrow the Vomit Comet? That would really impress the teacher.
Never mind...just kidding.
(Where is that halo smilie, where the halo is supported by horns, when I need it?
)
On a slightly more serious note...although I do consider the battle school re-enactment to be a serious suggestion, as I've always had a good result when doing audience-participation presentations...I think the journal idea is a good one. You could write from the point of view that you are in battle school and describe a typical day or week there.