The most interesting thing was the total experience of working with such amazing professional astronomers doing real science. I really did not know what to expect. The experience did exceed, in a positive way, all my imaginations.
I rarely get out among other teachers in the same field as I am, with similar interest and motivations, and even less often do I have time to be in the company of professional scientists to see and hear what they are doing, how it is being done, what technologies are being used, etc. Without this type of program to get me to a meeting like the AAS I would never be able to put all of this together.
My confidence level speaking to this vast assortment of astronomy professionals has risen significantly, and this translates directly to my ability to convey what I have learned and experienced -- to not only my students but other teachers and my community.