CommonLit has been shown to accelerate learning for students. In a large scale, nationwide study (n=113K) conducted in collaboration with Mathematica, students with higher levels of exposure to CommonLit 360 saw 2.1 months of additional learning.

The Mathematica study also found that students in CommonLit classrooms were more likely to report that class was engaging, interesting, and kept their attention. They were also more likely to say they felt proud of their background and had the chance to learn about other cultures compared to students in classes that did not use CommonLit.

After completing the Mathematica study, CommonLit was awarded  ESSA Tier III certification for the effectiveness of its program. As of 2022-2023, only 4 out of the 100 of the most accessed EdTech products have earned this badge. Because CommonLit has earned this distinction, districts can use additional ESSER funding to bring our full instructional program to their schools.

In a study conducted by LearnPlatform, there was a clear and positive correlation between CommonLit lessons completed and scores on the New York State end-of-year assessment. The more CommonLit lessons students submitted, the higher test scores they saw on average.

Two studies found a clear relationship between students’ scores on the CommonLit Assessment Series and state ELA assessments. Schools can unlock the Assessment Series to monitor student progress and help students prepare for these end-of-year tests.