Most of my work with teachers on preparing for NGSS is focused around the Science and Engineering Practices. But some teachers are really interested in understanding the content shifts- the answer to the ever-present "Yeah, but what am I going to have to teach?"
So, I'm working on this document that shows the topic shifts for elementary teachers in California. Take a look, and comment!
CA NGSS Content Shifts
UPDATE: A colleague on the NGSS NSTA listserv fleshed this out a bit:
Content Shifts Expanded