Rainer Müller Rolf V. Olsen Bradley S. Ambrose Manjula D. Sharma Edward F. Redish electronium Jeffrey T. Morgan Sura Wuttiprom duality Lillian C. McDermott David B. May Peter Fletcher orbitals Richard N. Steinberg electrons measurements learning pathways Chernchok Soankwan energy levels Johan Falk atoms spinn Gordon Aubrecht time dependence Katherine K. Perkins Greg Ireson Chandraleka Singh C. Nakiboglu concept inventory Marion Budde photoelectric effect Daniel Domert Sarah B. McKagan tunnelling Ian Johnston Helmut Fischler literature review Brian Woolnough Lei Bao Ratchapak Chitaree Jürgen Petri Michael C. Wittmann Thomas Bethge probability uncertainty Dean Zollman misconceptions teaching models Keith S. Taber photons wavefunction H. Wiesner potential step George Kalkanis Hanna Cassens Carl E. Wieman classical depictions Azam Mashhadi Hans Niedderer Seth A. Rosenberg