Is CommonLit’s Assessment Series valid? 

This article is intended only for customers and partners using the Assessment Series.

CommonLit works hard to ensure that scores produced by the Assessment Series assessments are both reliable and valid. Before any students take CommonLit’s assessments, the assessment development team carefully screens passages to ensure they meet CommonLit’s high standards and do not contain any content that could potentially be biased toward certain groups of students. Questions are developed following a rigorous multi-step process and then field tested with several thousand students.

Previous research has shown that CommonLit’s assessment scores developed by the team were highly associated with standardized state test scores, like the Florida Standards Assessment (FSA). Additional research is being conducted to evaluate how well students’ scores on the Assessment Series predict performance on standardized state test scores.

Internally, CommonLit’s data analysts run a series of statistical analyses of student assessment results to ensure that students’ scores on the assessment are consistent and can be trusted. A reliability estimate above 0.8 suggests that students are answering questions correctly or incorrectly in consistent and predictable patterns, based on the difficulty of the questions. CommonLit’s Assessments consistently surpass that benchmark.

Interested in getting these affordable, rigorous benchmark assessments at your school or district to track student reading progress over the course of the year? Learn more about CommonLit's Assessments here.