I think 37 is a big class for Sonoma MG program. Napa has 19 and we still have much to teach them. I too am in the middle of wine country and have been an MG for 19 years. The program teaches us how to look up UC approved information. We surely can't remember it all. It does bring gardeners together and has improved my garden a great deal as I love to experiment. Right now my 8 swales are full and this is something I learned from MG program. Penny