The purpose of this technical appendix is to more fully describe the sample, methods, and results of the research brief "Boys Regain the Advantage in Middle School STEM Skills: Post-COVID Trends in Gender Achievement Gaps." The authors investigated three research questions in this brief: (1) How have 8th grade gender gaps in STEM…

In the last two decades, the US has made remarkable strides in closing long-standing gender inequities in academic achievement in STEM (science, technology, engineering, and math) fields. However, new data suggest these hard-won gains may be unraveling. During the COVID-19 pandemic, girls showed substantially larger declines in math and science…