Eh...these tables don't have the growth norms that you may be thinking of. You can use the status norms to find a child's approximate percentile, based on RIT score. You can also use the growth to describe the expected growth of a population of students, but individual students don't necessarily have the same curve, with known differences in growth for students who are above and below the mean at the beginning of the year. What you really want for comparing growth is growth norms that are broken out by percentile tiers. E.g., the mean beginning-to-end of year growth for the child who performed in the 85th %ile in fall was xx points.
To do that, you might enjoy playing with this little Excel tool that NWEA developed for teachers:
https://legacysupport.nwea.org/support/article/2015-achievement-status-and-growth-calculatorInput the beginning and end RIT scores by content area and grade (if you don't know the exact week of school in which testing was conducted, use the defaults), and it pops out your student's growth percentile, which, one hopes, will fall at or above the 25th %ile (average and up). Though in some schools, 16th %ile is the cutoff for average.
