It's always fun when this kind of thing happens. It's doubly interesting that it was organized by the school's student union. I always wonder why more schools don't have those.
What was the last standardized test you took? How did you do? I think the last real one that I took was the teachers' licenture test, and as I recall, I smoked it. I also took part of an AP Reading practice test, and did...erm...less well.