Using the most recent norming study involving a sampling of RIT scores from 5.1 million students, NWEA data specialists have been able to report with great precision the mean fall to spring, spring to spring, and fall to fall RIT score growth of students assessed in the Language Usage, Mathematics, and Reading NWEA Measures of Academic Progress® (MAP®) assessments. These growth scores are provided on several reports, including the Student Progress Reports, the Achievement Status and Growth Reports, and a number of reports within the Dynamic Reporting Suite.
The growth norms used are very precise. Due to the enormous number of students involved in the norming study, NWEA staff have been able to calculate the mean growth of similar groups of students from each grade level (2-10) who scored at each RIT level in the initial testing season. .
Being able to access these mean growth norms gives teachers the opportunity to help students set realistic growth targets, which many educators find to be a beneficial way to involve students with assessment data. It should be noted that the growth norms indicate mean growth, which means that some of the norming group students scored at or above that number, and a relatively equal amount of students scored below that number. Therefore, not every student will attain the mean growth target. NWEA provides the standard deviation for each group (indicating the range above and below the mean in which two-thirds of the norm group scored) on the Achievement Status and Growth Calculator, available for download after logging in to the NWEA Reports site. These mean growth norms, therefore, serve as a starting point for growth discussions between students and teachers.