Jeff Weiner @jeff_active is a postdoctoral research fellow, managing CERN’s national and international teacher training programmes and investigating teachers’ conceptions of particle physics. He completed his PhD in physics education research in cooperation with the University of Vienna and his doctoral research was focused on how to appropriately introduce elementary particle physics in early physics education. Before joining CERN, Jeff worked as a high school physics, philosophy, and psychology teacher in Vienna, Austria. Aside from his postdoctoral research projects and the coordination of CERN’s Teacher Programmes he is also heavily engaged in CERN’s S’Cool LAB. In addition, Jeff is a highly active conférencier and guide, who has introduced thousands of students to the fascinating world of high energy physics.