I will be exhibiting December 4-5 at the conference of the Pennsylvania association of science teachers in State College, PA. I will make available copies of the new edition of my lab manual, free samples, and sample activities (including the "homemade" fuel cell). This should give me better exposure than the conference in MD because the exhibits will last for two days (instead of one) and PA has double the population of MD. Stop by my booth if you are in town.