Time-on task
’ on-task behavior
Time-on task is evaluated in mathematics classes or the time at which the AB are to be held and in the consecutive class 1 h later. Students’ on-task behavior was graded attending to the guidelines used Mahar et al. (During each assessment, a researcher observes six students. Each investigator has 15 s to observe and identify the type of behavior exhibited by each student, recording the observations on a worksheet before moving on to the next student. The investigators are in a spot where they can see the whole classroom properly. They use headphones and a prerecorded track with audible signals that indicate when to evaluate to the next student. Before data collection, the evaluators underwent a familiarization process with the measurement of this variable in the same context (i.e., teachers, students and classroom) to be assessed. This helped mitigate any potential reactivity effects that students and teachers might exhibit.