This article focuses on student participation in the research process as a contribution to school improvement. The specific aim of this article was to explore students' participation in different phases of a research process and discuss how their participation can contribute to school improvement. Based on a life-world phenomenological ontology, we used two research and development projects--Full of Value and Arctic Children--to shed light on participation in research. When doing research together with students, we have been inspired by Participatory Appreciative Action Research (PAAR). The methods used in the projects were open writing, group reflection, drawings, and exhibition discussions. This research showed that students were able to explore and express their lived experiences of behaviour and well-being in school, and how this was linked to positive change. We found students trustworthy, capable, and competent, enriching the process of school improvement.