Geertje Postma has successfully completed an online course through Coursera titled "Resilience in Children Exposed to Trauma, Disaster and War: Global Perspectives". The course, led by Ann S. Masten from the University of Minnesota, focused on concepts and methods for studying resilience in children facing adversity, highlighting lessons from 50 years of research and applications to promote resilience. The statement acknowledges that the online course differs from the on-campus version and does not confer academic credit or a degree from the University of Minnesota.