Ah, found it....on a slide presentation that I'm still processing. It looks like there are 3 sets of grade norms (fall, midyear and spring) and monthly age norms.
Ah, then I shall defer to Dottie who always knows more about assessments

! My prior post was off by a bit, then. I do believe that was what my district told us, though. Maybe if the district scores them internally rather than sending them off to the publisher for scoring, they use rougher age norms than what is otherwise available or maybe I was just given bad info -- lol!