Inverness Research studied the American Museum of Natural History (AMNH) Seminars on Science program for eight years, from its inception in 1998 to 2006. This paper presents teacher survey ratings for "In the Field with Spiders," along with the profile of a teacher who took the course. Course takers report on the annual follow-up surveys that "In the Field with Spiders" has benefited them personally and professionally, and that their students also profit. This course ranks highly among the AMNH courses for the extent to which it contributes to the course taker's own learning and also for its effectiveness in stimulating student interest in the course topic. This paper presents a small sample of the findings based on the responses of the 35 learners from 17 states who have completed follow-up surveys about the quality and value of the course. The majority of survey takers (80%) are K-12 teachers, but informal science educators and preservice teachers also provided feedback about how the courses have benefited them personally and as educators. (Contains 3 footnotes.)