Ballotpedia, School responses to the coronavirus (COVID-19) pandemic during the 2020-2021 academic year (State reopening regimes, mid-year closures, return orders, monthly status) (June 30, 2021) (Ex. SEC-15-002)
Ballotpedia (secondary source; Burbio data), Ballotpedia, 'School responses to the coronavirus (COVID-19) pandemic during the 2020-2021 academic year' (July 8, 2021) (Ex. ECO-B-106)
