Outlined is the history of superconductivity and described are the physical and chemical principles upon which it rests. Some possible applications of superconductors are considered. (RH)

Presented are three theories of superconductivity: (1) the London theory; (2) the Bardeen, Cooper, Schrieffer (BCS) theory; and (3) the sudden-polarization theory. (RH)

Described is a student preparation of YBa2Cu3O8-x, a classroom demonstration of its superconductivity, and an analytical chemistry experiment dealing with the oxidation state of copper in the material. (RH)

Presented are the materials and a procedure for demonstrating the levitation of a magnet above a superconducting material. The demonstration can be projected with an overhead projector for a large group of students. Kits to simplify the demonstration can be purchased from the Institute for Chemical Education of the University of Wisconsin-Madison.…

Described is a simple demonstration that provides a way to determine if a given sample contains even a small fraction of superconducting material. The repulsion of the powder from a magnetic field is indicative of superconductivity. (RH)

Described is recent history related to polymer science and engineering. Developments from 1920 to the current time are discussed. (RH)

Described is a workshop for grades 5-8 school teachers and students related to synthetic polymers. Participants become familiar with polymer theory and practice experiments they can use in class. Sources of materials used in the workshop are listed. (RH)

Included are two articles related to the use of computers. One activity is a computer exercise in chemical reaction engineering and applied kinetics for undergraduate college students. The second article shows how computer-assisted analysis can be used with reaction rate data. (RH)

This is part two in a series on classroom demonstrations of polymer principles. Described is how large molecules can be assembled from subunits (the process of polymerization). Examples chosen include both linear and branched or cross-linked molecules. (RH)

This experiment/demonstration provides elementary through high school science students with hands-on experience with polymer entropy. Construction of a simple machine for converting light into mechanical energy is described. (RH)

Listed are ways to demonstrate physical and chemical properties of matter and to show electrolysis using an overhead projector. (RH)

Included are demonstrations that illustrate (1) the chemistry of air pollution, (2) combustion and explosion, and (3) various properties of liquids. (RH)

Described is a teaching method for chemistry that gives college students practice in experimental design. Students are given a problem and required to design a procedure to solve the problem. Problems increase in complexity as the students progress through the courses. (RH)

Described is an experiment to investigate the plasticizer content in polyvinyl chloride (PVC) products. The experiment is designed for college students using an instrumental analysis laboratory. (RH)

Discusses the need for more safety instruction in high school and college chemistry courses. Reports on a national survey of 2019 college and university chemistry departments. Includes survey results and the descriptions of 50 accidents which the institutions reported. (TW)