A unit of study for gifted fourth and fifth graders is described on the subject of mathematical periodicity and chaos and the underlying physical processes which produce these phenomena. Hands-on activities, data analysis tools and computer aids are used for instruction in simple periodic motion (pendulum), complex superposition of motions…

Discusses the role and value of scaffolding student discussions in advancing students' ability to coconstruct theories and models from data they have collected while investigating floating and sinking. (Author/CCM)

Presents a letter written in response to a videotape presented to a teacher by a student; the videotape denounced evolution on religious grounds. The letter explains some of the biases of the video to the class and the importance of learning about an issue before taking a stand against it. (PVD)