Zhou, Jin; Heckman, James J.; Liu, Bei; Mai, Lu; Chang, … - National Bureau of Economic Research - 2022
evidence for dynamic complementarity for medium- and low-ability children. Children who start behind only slowly catch up. Able … children are an exception. Most children master its goals for skill development, but the pace of learning varies greatly among … children classified by ability. The program scales well. Costs per pupil are roughly $500 (2015 USD). At the same ages …