Please feel free to edit and suggest ideas for field trips for video/photography/media classes: 

1. Universal Studios Hollywood.  Great youth programs for Filmmaking offer in conjunction with New York Film Academy. Students get a goody bag with a t-shirt.  3 hour lessons about directing, cinematography, or acting. I took 13 student during May of 2009 and it was fabulous. Highly recommended. $49 per student, 10 student minimum. See pictures below.

http://www.universalyouthprograms.com/workshops_lessons/nyfilmacademy.aspx