We live in times of multiple crises. Climate change, degradation of soils, loss of biodiversity, COVID-19, and the war in Ukraine, to name but a few. School leaders are challenged in many ways to tackle the consequences of these crises, to prepare students for a future that will foreseeably be full of crises too, and to just do their “normal” daily work: to make sure that the school is running successfully in order to help students learn how to read, write, calculate, etc. Education for sustainable development (ESD) is a concept that aims at empowering learners with the knowledge, skills, values, and attitudes to address the interconnected global challenges we are facing. This article reports on a study that seeks to investigate what principals in Germany, China, and the United States do to integrate sustainability and ESD in their schools. It specifically addresses the issue of COVID-19 and its impact on the establishment of ESD.