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Under your leadership, the district can work to improve this culture while prioritizing class size.Second, reducing class size is easy while placing an effective teacher in every classroom is easier said than done.The average Kindezi student scores about 0.31 standard deviations above the state average, and according to the state’s Beating the Odds measure the school ranks in the 99th percentile statewide when benchmarked against schools serving similar students.So, yes, reducing class size is an effective means to raise student achievement.Evidence from the Tennessee STAR experiment shows that students assigned to classes with a maximum of 17 students scored 0.15 to 0.20 standard deviations above students assigned to classes with a maximum of 25 students.
The average APS student scores about 0.25 standard deviations below the state average.
The authors use a fuzzy regression discontinuity design to evaluate differences in achievement for schools just above and below a maximum class size threshold. Importantly, both studies indicate that the positive effects are even larger for disadvantaged students, a significant fact in a district were approximately 80% of students qualify for free and reduced lunch.
Unfortunately, the debate on class size was muddied by a number of ill-designed studies in the 1980’s and 1990’s that purported to show no effect, but in fact did not employ empirical designs that would allow the researchers to isolate the effect of class size on student achievement.
I begin with this information to provide context that will help you evaluate the research on class size in terms of its implications for the district.
Credible research design is essential to developing good causal estimates, and both randomized experiments and quasi-experimental research indicates that class size reductions positively impact student achievement.