NSTA STEM Expo 2013

I spent three days at the NSTA STEM Expo in St. Louis last week and over the next few days, I'm going to try to do a few posts related to the sessions I attended and things I learned (and cool freebies I learned about on the web).This is the second year I've attended, and while most of the sessions were not, unsurprisingly, about astronomy, they were all relevant to science and science education which is an underlying theme for my interest in astronomy.