Scaling cognitive science with classroom games for learning mathematics

We report two randomized evaluations of educational interventions targeting children in low-income neighborhoods of Delhi, India. Four math games, played in social groups, associated early emerging and universally intuitive concepts of number and geometry with the mathematical language, symbols, and operations taught in Delhi government schools. The first experiment, conducted in 231 NGO-run preschool classrooms (1,986 children) showed that the games enhanced children’s mastery of mathematics bo