*85%*:**Investigating Student Understanding of Quantum Physics: Spontaneous Models of Conductivity***56%*:**Investigating student understanding of basic quantum mechanics in the context of time-dependent perturbation theory***54%*:**Resources Students Use to Understand Quantum Mechanical Operators***53%*:**Investigating student understanding of quantum entanglement***52%*:**Improving Students' Understanding of Quantum Mechanics***49%*:**Investigating the Influence of Visualization on Student Understanding of Quantum Superposition***48%*:**Improving Students' Understanding of Quantum Mechanics***47%*:**A hierarchical model of the development of student understanding of momentum***47%*:**Addressing Student Models of Energy Loss in Quantum Tunneling***46%*:**How Does Technology-Enabled Active Learning Affect Undergraduate Studentsâ€™ Understanding of Electromagnetism Concepts?***46%*:**Model analysis of fine structures of student models: An example with Newton's third law***46%*:**The Influence of Student Understanding of Classical Physics When Learning Quantum Mechanics***46%*:**Modeling studentsâ€™ conceptual understanding of force, velocity, and acceleration***45%*:**Student understanding of quantum mechanics***45%*:**Preliminary Studies on Students' Understanding of Electricity and Magnetism for the Development of a Model Dased Diagnostic Instrument***45%*:**Improving student understanding of addition of angular momentum in quantum mechanics***44%*:**Testing the development of student conceptual and visualization understanding in quantum mechanics through the undergraduate career***44%*:**Exploring Student Understanding of Energy through the Quantum Mechanics Conceptual Survey***44%*:**Investigating Student Understanding for a Statistical Analysis of Two Thermally Interacting Solids**