Do smaller classes boost achievement mainly by helping teachers impart specific academic skills to students with low academic achievement? Or do they do so primarily by helping teachers engage poorly behaving students? The analysis uses the grade 3 to 4 transition in San Diego Unified School...

Do smaller classes boost achievement mainly by helping teachers impart specific academic skills to students with low academic achievement? Or do they do so primarily by helping teachers engage poorly behaving students? The analysis uses the grade 3 to 4 transition in San Diego Unified School...

Tracking refers to the practice of dividing students by ability or achievement. Students may be tracked within schools by placing them into different classrooms based on achievement, which is the typical practice in countries such as the United States or Canada. Alternatively, students could be...

Using different comparison groups than in earlier work, we find that ability tracking in math classes has little effect on growth in student math achievement. Previous articles use dummy variables to compare students from classes of high, middle and low ability to the average heterogeneously...