*43%*:**Presentation of integrals in introductory physics textbooks***39%*:**Assessing students' ability to solve introductory physics problems using integrals in symbolic and graphical representations***39%*:**Comparing Student Ability to Reason with Multiple Variables for Graphed and Non-Graphed Information.***39%*:**Investigating student ability to follow and interact with reasoning chains***39%*:**Probing Student Ability to Construct Reasoning Chains: A New Methodology***34%*:**FCI normalized gain, scientific reasoning ability, thinking in physics, and gender effects***32%*:**The relationships between spatial ability, logical thinking, mathematics performance and kinematics graph interpretation skills of 12th grade physics students***31%*:**Instructors' reasons for choosing problem features in a calculus-based introductory physics course***30%*:**Using Analogical Reasoning to Deal with 'Deep' Misconceptions in Physics***30%*:**Student Interpretation of the Signs of Definite Integrals Using Graphical Representations***30%*:**Additional Evidence of Far Transfer of Scientific Reasoning Skills Acquired in a CLASP Reformed Physics Course***30%*:**What the Integral Does: Physics Students' Efforts at Making Sense of Integration***30%*:**How students describe infinitesimal sources and infinitesimal spaces in integrals***29%*:**Strategy Levels for Guiding Discussion to Promote Explanatory Model Construction in Circuit Electricity***26%*:**Non-formal reasoning: Use of analogies, extreme cases, and physical intuition***26%*:**Using conceptual blending to describe how students use mathematical integrals in physics***26%*:**"Like Dissolves Like": Unpacking Student Reasoning About Thermodynamic Heuristics***25%*:**The construction of different classroom norms during Peer Instruction: Students perceive differences***25%*:**Scientific reasoning abilities of nonscience majors in physics-based courses**