Middle school or junior high? How grade‐level configurations affect academic achievement

Does the grade‐level configuration of a school affect academic achievement? This research examines the effect of attending a middle/junior high school on academic outcomes in British Columbia, Canada, relative to attending a school from kindergarten through grade 8. Using an OLS strategy, I find that attending a middle/junior high school reduces grades 4 to 7 achievement gains in math and reading by 0.125–0.187 and 0.055–0.108, respectively. Similar‐sized estimates are found for math using a 2SLS strategy. Finally, large negative effects on grade 10 and grade 12 English exams are also found.