@theluthier I think it would probably be better to go ahead and do the usual beginner class for the current version in August, and just take advantage of the beta period to familiarize yourself with 2.8 in the background. The first release candidate isn’t due out until October and even that isn’t “the” “official” final 2.8 release necessarily, so if you put off the beginner course until after 2.8 who knows how long you might have to wait before you’re able to do it?
It may end up that you do the beginner class in August, the shading class in October, and the first 2.8 beginner course in December or even start off January with it – new year, new Blender! – but I don’t think anyone would mind, I suspect that first 2.8 beginner course will be very very popular.