A few students surprised me. Their abilities increased over the course of the semester, and a number of them became better at communicating their information. And it's given me some ideas of how to approach my future studies.
I also have a link for you... 7th grader's perceptions of scientists before and after a trip to Fermilabs. Allow me to say that I would have killed for a field trip to a place like Fermilabs when I was in school.