az1,
It's important to note that the RIT is not grade level dependent but the percentile (NWEA norm) is grade level dependent. I think that's the problem I'm having with my daughter's results.
Here's a good slide show about the MAP test and slide # 15 highlights the difference between RIT and percentile.
http://www.mvcsc.k12.in.us/nwea/datacoachThat link isn't working anymore. This is a similar slide but you'll need to click it a few times:
http://springfield.ccsdschools.com/.../site/hosting/Map1/teach_mod_8_03.ppt#44 or this
http://tinyurl.com/3gorbk