A key objective of ESA's ESERO project is to help with teacher training courses based on space-related resources. This is achieved either by introducing ESA material to existing courses or by developing and delivering original courses. Such endeavours are performed in collaboration with appropriate national partners. When possible, the courses are officially accredited Continual Professional Development (CPD) courses. In addition, ESERO offers workshops at space facilities or training sessions during education conferences. At the events, the emphasis is often on practical hands-on activities.