Data Analysis
Descriptive data were analyzed using IBM SPSS 27. The intraclass correlation coefficient for the outcome variables at baseline ranged between < 0.001 and 0.062 (see Online Resource 2 Table i for details). We estimated the The academic pre-test characteristics of student’s attended school years as well as teacher’s highest education, work experience, weekly workload, and average child-supervision ratio at baseline did not significantly differ between study conditions (