*59%*:**Improving Students' Understanding of Quantum Mechanics***57%*:**Improving students' understanding of quantum mechanics by using peer instruction tools***55%*:**Improving students’ understanding of quantum measurement. II. Development of research-based learning tools***48%*:**Improving Students’ Understanding of Quantum Measurement***48%*:**Surveying students' understanding of quantum mechanics in one spatial dimension***47%*:**Quantum Mechanics Survey (QMS)***47%*:**Improving student understanding of addition of angular momentum in quantum mechanics***46%*:**Enhancing student visual understanding of the time evolution of quantum systems***46%*:**Interactive Learning Tutorials on Quantum Mechanics***45%*:**Improving Student Understanding of Vector Fields in Junior-Level E&M***44%*:**Assessing and improving student understanding of quantum mechanics***44%*:**Improving Students' Understanding of Electricity and Magnetism***43%*:**Testing the development of student conceptual and visualization understanding in quantum mechanics through the undergraduate career***43%*:**Development and validation of a sequence of clicker questions for helping students learn addition of angular momentum in quantum mechanics***43%*:**Exploring Student Understanding of Energy through the Quantum Mechanics Conceptual Survey***42%*:**Improving students' understanding of quantum mechanics via the Stern–Gerlach experiment***41%*:**Using student-generated content to engage students in upper-division quantum mechanics***40%*:**Investigating student understanding of basic quantum mechanics in the context of time-dependent perturbation theory***40%*:**Student Understanding of Tunneling in Quantum Mechanics: Examining Interview and Survey Results for Clues to Student Reasoning**