For both physicists who teach students in university and physics educators, how physics should be taught is a vital question. This study reviewed the trends of research in the field of physics education to identify the status of physics education research and help researchers in future studies. 2,959 articles were collected from the American…

The ability to categorize problems based upon underlying principles, rather than surface features or contexts, is considered one of several proxy predictors of expertise in problem solving. With inspiration from the classic study by Chi, Feltovich, and Glaser, we assess the distribution of expertise among introductory physics students by asking…

In response to the President's Office of Science and Technology Policy request to identify promising areas for U.S. research investment in science and technology, this report contains briefings by outstanding researchers in several fields of science. This volume is the fifth in a series of briefings which are used to anticipate important new…