The Impact of COVID‐19‐Related School Closures on Student Achievement—A Meta‐Analysis

Academic performance of K-12 students in an online-learning environment for mathematics increased during the shutdown of schools in wake of the COVID-19 pandemic

(2021) Markus Wolfgang Hermann Spitzer et al.   PLoS One

Effects of COVID-19-Related School Closures on Student Achievement-A Systematic Review

(2021) Svenja Hammerstein et al.   Frontiers in Psychology

Comparison of the effect of online teaching during COVID-19 and pre-pandemic traditional teaching in compulsory education

(2021) Xiaoying Feng et al.   JOURNAL OF EDUCATIONAL RESEARCH

COVID-19 learning losses: Early grade reading in South Africa

(2021) Cally Ardington et al.   INTERNATIONAL JOURNAL OF EDUCATIONAL DEVELOPMENT

Small-Sample Methods for Cluster-Robust Variance Estimation and Hypothesis Testing in Fixed Effects Models

(2016) James E. Pustejovsky et al.   JOURNAL OF BUSINESS & ECONOMIC STATISTICS

Modeling Clustered Data with Very Few Clusters

(2016) Daniel McNeish et al.   MULTIVARIATE BEHAVIORAL RESEARCH

ROBINS-I: a tool for assessing risk of bias in non-randomised studies of interventions

(2016) Jonathan AC Sterne et al.   BMJ-British Medical Journal

ROBINS-I: a tool for assessing risk of bias in non-randomised studies of interventions

(2016) Jonathan AC Sterne et al.   BMJ-British Medical Journal