Emily Oster and her colleagues recently released a research series titled "State Test Score Results Data Series," which compiles data from 20 state tests, encompassing millions of students.
The introduction to this research states: "The State Test Score Results Data Series explores state-level trends in ELA and math proficiency outcomes on state standardized assessments, both before and after the COVID-19 pandemic. Specifically, the Data Series presents math and ELA proficiency trends on state assessments between Spring 2018-Spring 2023, as available. Results are presented for the state overall, by race/ethnicity, and by district poverty levels for school-age children. Data presented in each State Brief are specific to the state’s assessment and are not comparable to other states."