Experimental Design
The 190 schools selected to participate in the study were divided into pairs of similar units, based on administrative and baseline survey data. In April 2021, a public draw was held to assign one school within each pair to the treatment group and another to the control.
In short, the trial is composed of three arms:
- In 2021: 9th grade students and their math teachers at treatment schools received the program;
- In 2022: the students who received the program in 2021, were assigned to a second dose of it in the 10th grade, while their teachers received the training for the first time;
- In 2022: at the same schools, 9th grade teachers who received the program in 2021, were assigned to a second dose of training, while 9th grade students received the program for the first time.