Table 1.
The distribution of treatments and controls across schools.
Fig 1.
A typical chess exercise from the book used for chess instruction.
Table 2.
Descriptive statistics, background variables.
Table 3.
Average standardized outcomes.
Table 4.
Estimation results, post intervention test-scores.
Table 5.
Estimation results, change in test-scores.
Table 6.
Impact estimates by grade.
Table 7.
Impacts by different math domains.
Table 8.
Impacts by happiness.
Table 9.
Impacts by boredom.