30 Years of Experimental Education Research in the Post-Soviet Space: A Meta-Analysis of Interventions

This is supplementary material to the article "30 Years of Experimental Education Research in the Post-Soviet Space: A Meta-Analysis of Interventions". This meta-analysis systematically evaluates the potential of available research in post-Soviet countries as a basis for an evidence-based approach to improving student achievement. The study was conducted on a selection of 41 publications describing educational interventions aimed at improving student achievement. The supplementary material provided here consists of three files that we would like to share with you:
Supplementary_file_1 - xlsx database with coded characteristics of all studies and effect sizes included in the analysis;
Supplementary_file_2 - a short version of the database in xlsx format with variables used in the multi-level analysis to calculate the pooled effect size and to examine moderators;
Supplementary_file_3 - docx file with all R codes used for the analysis in the article.