COVID-19 and the State of K-12 Schools: Results and Technical Documentation from the Spring 2021 American Educator Panels COVID-19 Surveys [open html - 0B]
From the Preface: "This report provides additional information about the sample, survey instrument, and resultant data for the coronavirus disease 2019 (COVID-19) surveys that were administered to principals and teachers in spring 2021 via the RAND Corporation's American Educator Panels (AEP). This survey is part of a series that included spring 2020 and fall 2020 COVID-19 surveys. Technical documentation and reports based on those surveys are available at RAND Corporation, undated-b. The results of these surveys are intended to inform policy and education practice related to educators' and students' needs during the COVID-19 pandemic and beyond."
2021 RAND Corporation
RAND Corporation: https://www.rand.org/