Interpreting Scores on the Progress Monitoring Measures
To help you interpret scores on the Progress Monitoring Measures, you might find it most useful to look at the Individual Student Reports. You'll see that these reports include percentile lines that extend from the left to the right, giving you a general idea of what raw scores would correspond to the different percentile lines at any given moment in time.
If you would prefer to use the detailed percentiles lookup table, then you would use the percentiles that fall closest to the date on which the student took the assessment. Basically:
The Fall season ranges: August 1 through October 15
The Winter season ranges: December 1 to February 15
The Spring season ranges: March 15 to June 15
Say you test a student on October 20. You would refer to the Fall percentile ranks. If you were to test a student on November 15, that date is closer to December 1 (start of Winter benchmark norming range) than it is to October 15 (end of Fall Benchmark norming range), so you would likely want to refer to the Winter norms when interpreting performance. If the student is tested somewhere in between those two dates, so about equal-distant to the fall and winter norming date range, I would look at both Fall and Winter Benchmark percentiles, knowing that the time in which the student took the test fell in the middle of those two norming windows.