It provides a profile of upper secondary school teachers, focusing on demographic characteristics, and of the schools in which these teachers work, with particular emphasis on school background information, the composition of students at the school and human and material resources. The chapter also examines classroom characteristics, including class size and the composition of students, and concludes by taking a look at the profile of upper secondary school principals and of school leadership. It is of note, however, that in each of the participating countries and economies, at least 30% of the teachers are men.