Describes an experiment using chromatographic techniques on aging leaves which gives high school biology students the opportunity to observe, question, and formulate hypotheses. (CS)

Describes a method for undergraduate physiology students to measure plasma volume by the dye dilution technique, in which a computer is used to interpret data. Includes the computer program for the data analysis. (CS)

Procedures used by a primary science class to build five different working solar furnaces are summarized. Diagrams, illustrations, and graphs of children's results are included. (DC)

Laboratory procedures, equipment, teaching ideas, and resource materials related to physics are discussed. Topics include the construction of a liquid-metal pump, a hydraulic jack, and an apparatus which helps teach time/velocity graphs; current/voltage characteristics of a tungsten filament lamp; and an electric circuit game. (DC)

Presents chemistry activities suitable for elementary students. Lists chemicals commonly used in elementary science, their common names, and where they may be obtained. (DS)

Describes a preschool science-based curriculum which encompasses four broad topics: water, small creatures, gadgetry, and environmental terraria. Includes a description and list of activities for each topic. Presents research suggesting that children participating in this curriculum increased their self-directed discovery and verbalized curiosity.…

Examines the pros and cons of laboratory instruction. Complaints lodged against laboratory instruction include its high cost, and lack of research supporting the lab. Justifications listed include science education research supporting the lab, psychology, and common sense. (DS)

Suggests individual student projects for extra-credit work to enhance student individuality. Provides a sample information sheet for independent projects (with suggested activities), a listing of project requirements, and a project evaluation checklist. (DS)

Several experiments are described using common laboratory apparatus and readily available materials to generate resonance spectra of air columns. The advantages of this apparatus and method of demonstration are visual impact and accuracy of results. (CS)

In order to illustrate his claim that children are able to plan their own work and develop the strategies which are most aporopriate to themselves, the author presents his class notes on a science experiment designed and conducted by one of his elementary students. (Author/SJL)

Describes the construction of an apparatus which can be used to demonstrate vapor pressures of solids, liquids, and solutions. (SK)

Guppies serve as a hardy, inexpensive, yet interesting species for classroom observation. Through a series of observations of individual males, groups of males, and males with females, students discover the signals male guppies use to set up social structure and to court females. (Author/DC)

Describes the relationship of Popper's theory of knowledge to chemistry instruction. Suggests that students be allowed to learn from their mistakes and presents five experiments with an implicit falsification purpose. (JN)

Summarizes viewpoints on the use of animals in science experiments in the biology classroom, including those of teachers, education researchers, biomedical scientists, science education administrators, and animal welfare advocates. (Author/CS)

Describes an inexpensive physics apparatus and experiment to dynamically determine Young's modulus for thin reeds and wire samples. (HM)