Layers: not just for winter anymore

I think today, sitting in biology class I finally reached the breaking point. I just can't dress for my classes and my dorm room in the same fashion. All my classes seem to be those A/C heavy beauties that feel wonderful during the summer months...until you remember that you dressed for the hotter than blazes dorm room and therefore don't have adequate protection from the air circulation. I want to enjoy my summer months with the capris and sleeve-less shirts and flip-flops, but I also don't want to receive frostbite during early September.