Many versions of the classic Ira Remsen experience involving copper and concentrated nitric acid have been used as lecture demonstrations. Remsen's original reminiscence from 150 years ago is included in the Supporting Information, and his biography can be found on the Internet. This article presents a new version that makes the demonstration more…

This article discusses how an active learning environment was created in a community college class and a high school mathematics class using the same approach. In both settings the NCTM and AMATYC Standards, such as problem solving, communication, use of technology and alternate assessment, were fully embraced. The goal was to have students take…

The purpose of this study was to compare and analyze the differences between elementary, middle, and high school physical education classes in Korea based on teacher and student behavior and teacher-student interaction patterns. The subjects who participated in this study were fifteen certified full-time physical education teachers at selected…