2015 Normative Data - nwea View status and growth norms for both schools and students in math, reading, language usage and science. Consult our comparative data guidelines for assistance with What is the RIT scale? | NWEA Connection Jul 29, 2016NWEA reports also contain normative data from our norms study. You can find the percentile ranking for a particular RIT score on most reports, allowing you to compare a student's RIT score with other students in the same grade and subject. For additional information about the RIT scale and norms, see: Normative Data & RIT Scores.