Describes a chemical engineering course for liberal arts students that is taught from a scientific, social, and symbolic perspective. A summary of the early days of oil refining is included as representative of one of the major content segments of the course. (ML)

Advocates the accuracy of the common belief that the possession of energy drives, gives potential for, or accounts for change. Argues that the term "free energy" or entropy represents the possibility of change. Recommends that educators reexamine their use of these terms to prevent common misconceptions about energy. (TW)

Describes a framework for the construction of computer-aided learning programs and for the BBC microcomputer which has been used successfully as the basis of a set of genetics teaching programs called "Linkage." Includes program design principles and procedures. (ML)

Describes two different approaches to joint teaching by a health educator and a physician. Provides the script for a dual monologue, which is the basis for the first teaching activity. The second example differentiates between traditional, transitional, and modern models of health educations and the role physicians play in each. (TW)

Reviews the neural modeling principles of learning, perception, cognition, and motor control, discusses their applications to sensory-motor problem solving, and explores possible relationships between that pattern of problem solving and aspects of higher order formal operational problem solving. Cites implications for science education. (ML)

Designed to refine and extend the procedures and analyses of prior science teacher competency research, this study focused on the competencies perceived as important to effective science teaching. Included are explanations of the research approach, instrument development, sampling populations, and educational implications. (ML)

Discusses the use of ratio diagrams, which plot the calculations of equilibrium concentrations of the species of the carbonate system. Provides examples to describe how these diagrams can be used to illustrate the behavior systems of interest in volumetric analysis, where absorption or loss of carbon dioxide takes place. (TW)

Outlines a simple, inexpensive way of demonstrating electroplating using the reaction between nickel ions and copper metal. Explains how to conduct a demonstration of the electrolysis of water by using a colored Na2SO4 solution as the electrolyte so that students can observe the pH changes. (TW)

Provides background theory and an experiment relating to chemometrics. Describes the phenomenon where solutions are dichromatic or dichromic. Discusses the difficulty students have in describing such solutions that appear to be several different colors at the same time. (TW)

Discusses the importance of studying the far-from-equilibrium phenomena in college chemistry. Presents a system using the gas pendulum which displays all of the essential characteristics of dissipative systems. Promotes the use of the gas pendulum as a teaching example of a nonlinear far-from-equilibrium process. (TW)

Discusses the value of electrophoresis in the fields of protein chemistry and biochemistry. Describes how to build an inexpensive electrophoresis setup for use in either research or teaching activities. Details the construction of both the separating device and the power supply. (TW)

Presents a series of activities that use dinosaurs as a theme for teaching biological and geological concepts. The activities can be adapted for use with middle school through college level biology students. Exercises address such topics as: evolutionary relationships of vertebrates; Mesozoic ecology; animal tracks; and mineral replacement…

Surveys the present status of science instructional software in the United States. Describes project efforts at the University of Pittsburgh on the development of intelligent tutoring systems (ITS). Explains the major components and provides microworld examples of ITS. Includes the software evaluation instrument and summarizes the evaluation…

Explains a formal scheme for analyzing biological communications for implicit structural themes using principles of kinetic structural analysis. Presents study findings which focused on the role of sequential communication structures for enhancing reception learning of knowledge and conceptual schemes. (ML)

Determined if a written, persuasive communication would positively affect the attitudes of preservice teachers (N=98) and if the communication would differently affect subjects rated on three levels of self-esteem. Results indicate written persuasive communication could change the attitudes of the preservice elementary teachers in this study. (JN)