I have become familiar with the K-8 ones.
It took me a long time to fully digest them. Now I think I like the concepts a lot, BUT very few elementary teachers will be up to implementing them. Properly done, they outline something fantastic.
They seem to be overly specific in some instances, describing exact projects to be done in a certain way. (K: build a structure with tools and materials to reduce the heating effect of sunlight hitting the ground.) (This is from memory, don't pick on me.)
There are many underlying concepts which are woven into the standards but not called out on their own: science deals with the material world, scientists look for patterns, etc. A curriculum based on these which just happened to incorporate the fact knowledge and specific projects called for should be just what I want for my kids.
I haven't seen any developed curricula yet that claim to cover NGSS. I will be very interested to see them when they have been written. The public school teachers I spoke to hadn't seen the standards until this November, were supposed to teach them this year, and have no curricula to use.
