This article reports on reflection-based monitoring tools developed and used in an action research project to improve gender equality in science and research institutions. Several of these tools were developed to facilitate individual and joint reflection from the perspective of the co-researchers involved. The aim of the article is to make the case for the integration of a systematic reflection-based monitoring approach, to describe its approach and theoretical underpinnings that link critical reflection theory with reflexive action learning theory, and to present the details of six monitoring tools so that they can be adopted in other project settings. It also highlights how these monitoring tools stimulated both individual and group reflection and how they facilitated the sharing of knowledge and experience between change agents involved in co-production. The article also shows that the process monitoring approach based on systematic reflection can contribute to successful project implementation and offers several important advantages.