The Grady-Ewing vignette, filmed in a vérité style, follows an experiment in which ninth graders at a Chicago high school were paid to improve their grades: $50 for every grade above a C and the chance to win a $500 lottery.To qualify for payment, all students had to have all grades be C or higher, no in-school or out-of-school suspensions, and no more than one unexcused absence. If they qualified, 50% would be paid $50. The other 50% would be given a 10% chance at $500. Further, for 50% of either group, the parents would be paid. For the other, the students would be paid. (That is, there were four treatment groups and a control).
The Times gets the threshold wrong, eschews the payment of parents, and gets the payment doubly wrong.