*68%*:**Categorization of Mechanics Problems by Students in Large Introductory Physics Courses: A Comparison with the Chi, Feltovich, and Glaser Study***47%*:**Student Difficulties with Quantum Mechanics Formalism***47%*:**Conceptual and Mathematical Barriers to Students Learning Quantum Mechanics***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***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***41%*:**The Influence of Student Understanding of Classical Physics When Learning Quantum Mechanics***41%*:**Student Difficulties in Understanding Probability in Quantum Mechanics***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***40%*:**Exploring Student Understanding of Energy through the Quantum Mechanics Conceptual Survey***40%*:**Student Views of Similarity between Math and Physics Problems***40%*:**Improving students' understanding of quantum mechanics by using peer instruction tools***40%*:**Categorization of problems to assess and improve proficiency as teachers and learners***40%*:**Surveying students' understanding of quantum mechanics in one spatial dimension**