The aim of the project is to investigate the developmental dynamics between students’ well-being, motivational beliefs, and performance during primary education (grades 4–8), and the role of interprofessional collaboration in supporting students’ well-being in school. Utilizing an accelerated longitudinal design, students (three cohorts: grade 4, 5 and 6, N ≈ 600) are followed over a period of three years (2016-2019).