What is there to be up-to-date on? It doesn't teach evolution. It's rather dry and not as exciting as say, most prot science curriculums (Abeka), but you can always supplement with something with more colorful pictures. I suppose since Science is not my thing, I don't stress about this particular program. My children do Audubon Society activites outside the home, and read other Science books that support their interests in the subject (ie, my oldest daughter gorges herself on books about animals).