*79%*:**Improving student understanding of addition of angular momentum in quantum mechanics***73%*:**Exploring Student Understanding of Energy through the Quantum Mechanics Conceptual Survey***73%*:**Improving Students' Understanding of Quantum Mechanics***72%*:**Improving Students' Understanding of Quantum Mechanics***72%*:**Improving students' understanding of quantum mechanics via the Stern–Gerlach experiment***69%*:**Student Difficulties in Understanding Probability in Quantum Mechanics***68%*:**The Influence of Student Understanding of Classical Physics When Learning Quantum Mechanics***67%*:**Improving students' understanding of quantum mechanics by using peer instruction tools***66%*:**Improving students’ understanding of quantum measurement. I. Investigation of difficulties***63%*:**Improving students’ understanding of quantum measurement. II. Development of research-based learning tools***63%*:**Investigating student understanding of basic quantum mechanics in the context of time-dependent perturbation theory***60%*:**Surveying Students’ Understanding of Quantum Mechanics***60%*:**Improving Students’ Understanding of Quantum Measurement***60%*:**Surveying students' understanding of quantum mechanics in one spatial dimension***59%*:**Testing the development of student conceptual and visualization understanding in quantum mechanics through the undergraduate career***59%*:**Dynamics of Student Modeling: A Theory, Algorithms, and Application to Quantum Mechanics***59%*:**Student understanding of potential, wavefunctions and the Jacobian in hydrogen in graduate-level quantum mechanics***58%*:**Quantum Mechanics Students' Understanding of Normalization***58%*:**Using student-generated content to engage students in upper-division quantum mechanics**