In Indonesia, a replication of a Growth Mindset intervention had significant impacts on student academic performance – particularly in schools located in regions that could benefit the most. Student learning outcomes in Indonesia have remained lower than their regional neighbors and other middle-income countries, as suggested by the results of the Program for International Student Assessment – PISA. Aside from socioeconomic conditions and access to educational resources, student motivation may be another relevant reason behind the lag, particularly among low-income students.1 Data from PISA indicates that the majority of 15-year-old Indonesian students do not believe that abilities and intelligence can be developed. In prior work in Peru, eMBeD and World Bank colleagues had demonstrated the positive impact of a Growth Mindset intervention to improve student effort and, subsequently, test scores. Groundbreaking research, developed by Carol Dweck at Stanford University, has shown that people with "fixed mindsets" (who believe that intelligence is static) put less effort into learning than those with "Growth Mindsets" (who believe that intelligence can be improved with effort). In Indonesia, the Education, Poverty and Equity, and eMBeD teams from the World Bank, developed the "Semua Bisa Pinta!" (Everyone Can Be Smart!) project, a Growth Mindset classroom program adapted to the Indonesian context, with the goal of replicating the success in Peru.