In which countries do the most highly qualified and experienced teachers teach in the most difficult schools?

In which countries do the most highly qualified and experienced teachers teach in the most difficult schools?

Most countries can do more to oversee how teachers are allocated to schools: they should not only monitor the number of teachers, but also keep a close eye on their qualifications, experience and effectiveness. Any teacher policy that aims to tackle student disadvantage should strive to allocate high-quality teachers, and not just more teachers, to underprivileged students.