From left: Rodney Thomas, Tyreke Johnson and Malik Harris, at Burroughs Education Center in Washington, look at their payment vouchers
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In four cities, 18,000 kids earned a total of $6.3 million to do the right thing. Some incentives work better than others
[This article contains a table. Please see hardcopy of magazine.]
*Not including control groups
† A combination of metrics that varied from school to school but always included attendance and behavior