Norms and Percentiles Update

The easyCBM norms and percentiles were originally developed in 2013-2014. They were updated in the summer of 2020, and will continue to be updated on a five-year rotation thereafter. The next update will be completed for the fall of 2025.

Norms tend not to change too drastically over time. For instance, if you examine the Hasbrouck and Tindal ORF norms (Hasbrouck and Tindal ORF Norms), you will see that ORF norms have remained fairly constant over the past 25 years. However, it is generally accepted that student demographics shift over time, as do classroom teaching practices. Thus, most test developers update their norms every 5-10 years. Here at the University of Oregon, we opted to follow industry best practice in adopting a five-year norming cycle for the easyCBM assessments, beginning in 2020 and continuing every five years thereafter.