I study the effects of early between-school ability tracking on student achievement, exploiting institutional differences between German federal states. In all states, about 40% of students transition to separate academic-track schools after comprehensive primary school. Depending on the state, the remaining student body is either directly tracked…

Anybody who has studied education over the past forty years is aware that secondary education in England is the subject of continuous and continuing debate. Everyone has been to school and therefore everyone lays claim to some expertise--the lot of teachers is never easy. But it is a contention of this article that teachers are at least partly…