*35%*:**Do students use and understand free-body diagrams?***34%*:**Understanding the Variable Effect of Instructional Innovations on Student Learning***33%*:**A Cognitive Framework for Analyzing and Describing Introductory Students' Use and Understanding of Mathematics in Physics***32%*:**Examining the construction process: A study of changes in level 10 students' understanding of classical mechanics***31%*:**Assessing Student Understanding of Partial Derivatives in Thermodynamics***31%*:**Algebra-Based Students & Vectors: Assessing Physical Understanding in Arrow vs ijk***29%*:**Study of TA's ability to implement the***Tutorials in Introductory Physics*and student conceptual understanding*29%*:**Measuring Conceptual Change in College Students' Understanding of Lunar Phases***28%*:**Students' understanding and perceptions of the content of a lecture***28%*:**Student Learning In Upper-Level Thermal Physics: Comparisons And Contrasts With Students In Introductory Courses***28%*:**The Twin Twin Paradox: Exploring Student Approaches to Understanding Relativistic Concepts***28%*:**Mathematical vs. Conceptual Understanding: Where Do We Draw The Line?***28%*:**"After I gave students their prior knowledge" Pre-service teachers' conceptions of student prior knowledge***28%*:**Helping students develop an understanding of Archimedes' principle. I. Research on student understanding***28%*:**Students' interpretation of simple electrical diagrams***28%*:**The Effect of Practical Work on Students' Understanding of Combustion***28%*:**Improving Student Understanding of Coulomb's Law and Gauss's Law***28%*:**Boston University Physics Applets: P-V Diagram for a Refrigerator***28%*:**Indicators of Understanding: What TAs Listen for in Student Responses**