*47%*:**Improving Students' Understanding of Quantum Mechanics***46%*:**Examining the Evolution of Student Ideas About Quantum Tunneling***45%*:**Improving studentsâ€™ understanding of quantum measurement. II. Development of research-based learning tools***44%*:**Exploring Student Understanding of Energy through the Quantum Mechanics Conceptual Survey***44%*:**Dynamics of Student Modeling: A Theory, Algorithms, and Application to Quantum Mechanics***43%*:**Using student-generated content to engage students in upper-division quantum mechanics***42%*:**Investigating Student Understanding of Quantum Physics: Spontaneous Models of Conductivity***42%*:**Improving student understanding of addition of angular momentum in quantum mechanics***42%*:**Enhancing student visual understanding of the time evolution of quantum systems***41%*:**Model analysis of fine structures of student models: An example with Newton's third law***41%*:**Improving Studentsâ€™ Understanding of Quantum Measurement***40%*:**Addressing student difficulties in applying a wave model to the interference and diffraction of light***39%*:**Investigating student understanding of quantum physics: Spontaneous models of conductivity***39%*:**Addressing Students' Difficulties in Understanding Two Different Expressions of Gravitational Potential Energy (I): mgh & -GMm/r***38%*:**Improving Students' Understanding of Quantum Mechanics***38%*:**Deeper look at student learning of quantum mechanics: The case of tunneling***38%*:**Resources Students Use to Understand Quantum Mechanical Operators***38%*:**Investigating student understanding of basic quantum mechanics in the context of time-dependent perturbation theory***37%*:**Improving studentsâ€™ understanding of quantum measurement. I. Investigation of difficulties**