*69%*:**Algebra-Based Students and Vector Representations: Arrow vs. ijk***62%*:**Algebra-Based Students & Vectors: Can ijk Coaching Improve Arrow Subtraction?***34%*:**Comparing Student Use of Mathematical and Physical Vector Representations***34%*:**A research-based approach to improving student understanding of the vector nature of kinematical concepts***33%*:**Do students use and understand free-body diagrams?***32%*:**Testing Studentsâ€™ Understanding of Vector Concepts***32%*:**Student Understanding of Superposition: Vectors and Wave Functions***31%*:**Student Understanding of Cross Product Direction and Use of Right-Hand Rules: An Exploration of Representation and Context-Dependence***31%*:**Student difficulties with quantum states while translating state vectors in Dirac notation to wave functions in position and momentum representations***30%*:**Examining student understanding of matrix algebra and eigentheory***30%*:**Exploring Student Learning Profiles in Algebra-based Studio Physics: A Person-Centered Approach***29%*:**Assessing studentsâ€™ epistemic logic using clause topics during problem comparison***29%*:**Student conceptual resources for understanding mechanical wave propagation***29%*:**Exploring Students' Conceptions of Density: Assessing Nonmajors' Understanding of Physics***29%*:**A Research-Based Approach to Assessing Student Learning Issues in Upper-Division Electricity & Magnetism***29%*:**"Surprisingly, there is an actual physical applicationâ€¦" Student understanding in Math Methods***29%*:**Student Objections to and Understanding of Non-Cartesian Unit Vector Notation in Upper-Level E&M***29%*:**Analyzing student understanding of vector field plots with respect to divergence***29%*:**Tracking the referent system to understand students' math modeling processes**