This paper presents the findings based on case studies of the educational systems of England and of the Canadian province of Ontario, as part of a research project funded by the Thomas J. Alexander Fellowship Programme.1 This research project aims to provide inputs to policymakers and school leaders, especially in Latin America, to support teachers and schools with student behaviour issues and improve classroom and school climate. The purpose of these case studies is to investigate how system-level policies in four main areas (initial teacher education, professional development, professional collaboration and participation among stakeholders) and other types of system-level initiatives (such as student behaviour policies) have been implemented in order to improve disciplinary climate and help teachers to deal with student behaviour issues. It also aims to identify the conditions in which teaching and classroom practices take place, in order to understand the context of student behaviour and disciplinary climate in these educational systems.