Citizen science (CS) is a scientific research approach involving non-professional scientists in research and innovation at various stages. Active engagement with citizens and society has the potential to improve research and its outcomes and reinforce societal trust in science (Citizen Science factsheet 2020). CS is an essential part of the societal engagement pillar of the European Union formulation of open science and the UNESCO recommendation for Open Science. The objective of the PReCISE project is to promote Citizen Science, by capitalizing on the expertise of CIRCLE-U universities. It focuses on sharing expertise and building knowledge in CS to promote uptake of this approach and drive institutional change. To initiate this change, PReCISE will organize a hybrid Citizen Science Summer School (C3S) that will bring together UCLouvain and other CIRCLE U researchers (PhD students, postdocs, academics intending to use but unfamiliar with CS) together with CS experts from three CIRCLE U universities (Université Paris Cité (UPC), Aarhus University (AU), University of Vienna (UV)). PReCISE builds on a previous CIRCLE-U seed funded project, ASDOST-CitSci, which developed training materials for CS. With the support of three external institutions, the AfricaMuseum, Louvain Cooperation, and the University of the Western Cape, the C3S will focus on challenges of CS project implementation in Africa, allowing participants to explore best practices in this context.