Final report from a project that addressed the nationally recognized need to develop and deliver a robust package of work-based assessment (WBA) tools for health professional students in diverse clinical settings as a means of testing their teamwork competencies and interprofessional collaboration in the workplace. Teamwork competencies are included as both graduate attributes in general and in healthcare curricula in particular but are rarely assessed. The project provided an assessment framework that not only assesses students individually as team members but also considers a team as a single entity with a view to enhancing team performance. This partnership of four Australian and one Canadian university reviewed and evaluated existing WBA tools for teamwork across the health professions and developed a framework and instruments for formative assessment that are valid, reliable, feasible and suitable for the provision of timely and constructive feedback to students.;