*62%*:**Investigate Students’ use of Boundary Conditions using Symbolic Forms***45%*:**Applying a symbolic forms lens to probability expressions in upper-division quantum mechanics***43%*:**Students’ use of symbolic forms when constructing differential length elements***42%*:**Students’ difficulties with partial differential equations in quantum mechanics***40%*:**“So it’s the same equation...”: A blending analysis of student reasoning with functions in kinematics***39%*:**Students’ metarepresentational competence with matrix notation and Dirac notation in quantum mechanics***38%*:**Assessing students' ability to solve introductory physics problems using integrals in symbolic and graphical representations***38%*:**Student Difficulities with Boundary Conditions in Electrodynamics***38%*:**Tracking the referent system to understand students' math modeling processes***38%*:**Students’ difficulties with solving bound and scattering state problems in quantum mechanics***37%*:**Dynamics of students’ ontological reasoning across contexts in modern physics***37%*:**Students’ understanding of the concept of the electric field through conversions of multiple representations***37%*:**Introductory students’ attitudes and approaches to Physics problem solving: Major, achievement level and gender differences***36%*:**Do students use and understand free-body diagrams?***36%*:**Effects of metacognitive scaffolding on students’ performance and confidence judgments in simulation-based inquiry***35%*:**Students' understanding and application of the area under the curve concept in physics problems***35%*:**Students' dynamic geometric reasoning about quantum spin-1/2 states***35%*:**Student difficulties with quantum states while translating state vectors in Dirac notation to wave functions in position and momentum representations***35%*:**Sequential and simultaneous synthesis problem solving: A comparison of students’ gaze transitions**