In 2014, teachers’ salaries remained below those of other tertiary-educated workers in most countries. Relative salaries for pre-primary teachers are highest only in Luxembourg, where they are at least 8% higher than those of similarly educated workers (OECD, 2016: Education at a Glance 2016, Indicator D3). In this respect, statutory working hours and the child-to-staff ratio are two important system-level indicators to assess the quality of the school environment.