The series Research Syntheses is a quadrennial publication of the Research and Development Centre in Education and Training (UIDEF, Unidade de Investigação e Desenvolvimento em Educação e Formação), the research centre of the Instituto de Educação da Universidade de Lisboa, Portugal (IE-ULisboa). As a result of a collaborative work, the series testifies to UIDEF’s investigative activity in searching for relevant inputs for the scientific community and support knowledge-driven processes of transformation within educational systems, policies, and practices.