This chart represents the National Percentile Ranking. This indicates relative standing with students in the same grade who took the test at the same comparative time. Percentile rank range from 1 to high of 99 with 50 denoting an average performance for the grade.

The NPR is normally compared to the Los Angeles Unified School District scores in the California Achievement Test. In 2005, the CAT tested students in 3rd and 7th grade only.