*50%*:**Spin First vs. Position First instructional approaches to teaching introductory quantum mechanics***50%*:**Student perceptions of math-physics interactions throughout spins-first quantum mechanics***48%*:**Spin First instructional approach to teaching quantum mechanics in sophomore level modern physics courses***46%*:**Representations for a spins-first approach to quantum mechanics***46%*:**Student difficulties with determining expectation values in quantum mechanics***43%*:**On the Study of Student Use of Meta-Resources in Learning Quantum Mechanics***40%*:**Student difficulties with quantum states while translating state vectors in Dirac notation to wave functions in position and momentum representations***40%*:**Designing, validating, and contrasting conceptual quantum mechanics questions for spin states and spatial wave functions***40%*:**Development, validation and in-class evaluation of a sequence of clicker questions on Larmor precession of spin in quantum mechanics***38%*:**Resources Students Use to Understand Quantum Mechanical Operators***38%*:**Improving studentsâ€™ understanding of quantum measurement. I. Investigation of difficulties***38%*:**Improving studentsâ€™ understanding of quantum measurement. II. Development of research-based learning tools***38%*:**Student reasoning about sources of experimental measurement uncertainty in quantum versus classical mechanics***37%*:**PH425: Spin and Quantum Measurement***37%*:**Exploring Student Understanding of Energy through the Quantum Mechanics Conceptual Survey***36%*:**Quantum Mechanics Resource Packet***36%*:**Development and Evaluation of a Quantum Interactive Learning Tutorial on Larmor Precession Of Spin***35%*:**Investigating student understanding of basic quantum mechanics in the context of time-dependent perturbation theory***34%*:**A new multimedia resource for teaching quantum mechanics concepts**