*68%*:**Categorization of Mechanics Problems by Students in Large Introductory Physics Courses: A Comparison with the Chi, Feltovich, and Glaser Study***48%*:**Using student-generated content to engage students in upper-division quantum mechanics***47%*:**Student Difficulties with Quantum Mechanics Formalism***47%*:**Conceptual and Mathematical Barriers to Students Learning Quantum Mechanics***46%*:**Strong preference among graduate student teaching assistants for problems that are broken into parts for their students overshadows development of self-reliance in problem-solving***45%*:**Assessing and improving student understanding of quantum mechanics***45%*:**Changes in studentsâ€™ problem-solving strategies in a course that includes context-rich, multifaceted problems***45%*:**Student evaluation of more or better experimental data in classical and quantum mechanics***44%*:**Assessing Expertise in Quantum Mechanics using Categorization Task***42%*:**Dynamics of Student Modeling: A Theory, Algorithms, and Application to Quantum Mechanics***42%*:**Improving Students' Understanding of Quantum Mechanics***42%*:**Characterizing and monitoring student discomfort in upper-division quantum mechanics***41%*:**The Influence of Student Understanding of Classical Physics When Learning Quantum Mechanics***41%*:**Student Difficulties in Understanding Probability in Quantum Mechanics***41%*:**Surveying Turkish high school and university studentsâ€™ attitudes and approaches to physics problem solving***41%*:**On the Study of Student Use of Meta-Resources in Learning Quantum Mechanics***41%*:**Improving Students' Understanding of Quantum Mechanics***41%*:**Student understanding of quantum mechanics at the beginning of graduate instruction***41%*:**Improving student understanding of addition of angular momentum in quantum mechanics**