RIT Scores (NWEA MAP) Explained by Grade Level
If your child’s school uses the NWEA MAP test, their score is reported on the RIT scale (Rasch UnIT). Understanding what RIT numbers mean — and how to interpret growth — makes the MAP report much more useful.
How the RIT Scale Works
The RIT scale is a continuous equal-interval scale, meaning that a growth of 5 RIT points at any point on the scale represents the same increase in academic ability. Scores typically range from about 140 (early kindergarten) to about 300 (advanced high school). Unlike a percentage, RIT scores are not grade-specific — a 5th grader and an 8th grader can meaningfully compare RIT scores because they are on the same scale.
Average RIT Scores by Grade (NWEA Norms)
The following are approximate national average RIT scores based on NWEA’s published norms. These figures reflect beginning-of-year (fall) averages:
| Grade | Reading/ELA (Fall Avg) | Math (Fall Avg) |
|---|---|---|
| K | ~141 | ~140 |
| 1st | ~162 | ~163 |
| 2nd | ~180 | ~178 |
| 3rd | ~192 | ~188 |
| 4th | ~200 | ~198 |
| 5th | ~207 | ~208 |
| 6th | ~212 | ~218 |
| 7th | ~216 | ~225 |
| 8th | ~220 | ~230 |
These are population averages, not targets. NWEA publishes precise norms tables that include standard deviations — your child’s score report will include the exact norm comparison.
Average Growth Per Year
On average, students grow about 5–10 RIT points per year in both reading and math, though growth is fastest in the early grades and slows in middle and high school. Typical annual growth rates (approximately):
| Grade | Typical Annual Reading Growth | Typical Annual Math Growth |
|---|---|---|
| K–2 | 12–18 RIT points | 14–20 RIT points |
| 3–5 | 6–10 RIT points | 8–11 RIT points |
| 6–8 | 3–6 RIT points | 5–8 RIT points |
Reading Your Child’s Report
The MAP report shows your child’s current RIT score, the national average for their grade, and their projected growth target for the remainder of the year. Pay attention to whether your child is growing at, above, or below the projected rate — that context matters as much as the raw number.