Personal response systems ("clickers") have become an important means for instructors to gauge student learning in large lecture classes. In addition to measuring students' performance on a particular question, requesting a measure of mental effort from students allows for richer data concerning student learning. This information can be…

Interactive lecture demonstrations (ILDs) are a powerful tool designed to help instructors bring state-of-the-art teaching pedagogies into the college-level introductory physics classroom. ILDs have been shown to improve students' conceptual understanding, and many examples have been created and published by Sokoloff and Thornton. We have used the…