This article gives a view of the plastic waste management school project of Greening Africa Together (GATo) and deals with education for sustainable development and lifelong learning in this transdisciplinary university cooperation project. The main questions arising are: how can students become aware of the problem of waste management in their school milieu and, which specific learning response can guarantee a circular economy of waste in schools? The service-learning approach of all GATo-projects consists in an interdisciplinary working group of both local and international students, who together with the community stakeholders, will find a suitable and/or affordable solution to the problem identified.