Patrick J. McEwan
Improving Learning in Primary Schools of Developing Countries
Wellesley College
gathered 77 randomized experiments 111 treatment arms evaluated effects schoolbased interventions learning developingcountry primary schools average monetary grants deworming treatments mean effect sizes close zero statistically significant nutritional treatments treatments disseminated information treatments improved school management supervision small mean effect sizes 004006 always robust controls study moderators largest mean effect sizes included treatments computers instructional technology 015 teacher training 012 smaller classes smaller learning groups within classes ability grouping 012 contract volunteer teachers 010 student teacher performance incentives 009 instructional materials 008 metaregressions suggested effects contract teachers materials partly accounted composite treatments included training andor class size reduction insufficient data judge relative costeffectiveness categories interventions