Education Week (secondary source), Education Week, 'Map: Coronavirus and School Closures in 2019-2020' (Mar. 6, 2020; updated Oct. 13, 2021) (Ex. ECO-B-050)
Education Week (secondary source), Education Week, 'Which States Banned Mask Mandates in Schools, and Which Required Masks?' (Aug. 20, 2021; updated July 8, 2022; last data May 23, 2022) (Ex. ECO-B-117)
