In recent years, managing a vocational laboratory has become an increasingly difficult and complex task facing many vocational educators. Specialized instructional areas, diverse groups of students, and extended laboratory time have caused educators to seek alternate ways of providing practical "hands-on" instruction when traditional supervised…

The laboratory method has institutionalized itself in the larger social system, and an investigation of how this came about provides an important case study of social intervention. Uses of the method's intrinsic "change-agent" concept are illustrated, and particular aspects of the growth of the movement are examined. (Author)

This document provides information on the most commonly asked science safety questions by science teachers primarily at the secondary school level. Topics include the legal responsibilities of a science teacher, a general safety checklist, proper labeling and storing of chemicals, purchasing of new chemicals and disposing of old chemicals, a…

This study reports on the courses in biological sciences offered in public high schools, enrollments in the course in general biology, number of teachers of general biology, organization of the course, nature of the laboratory work, laboratory and supplementary facilities, the equipment used in teaching the course, appropriations for equipment and…

A study of the educational laboratories and university research and development centers has revealed several characteristics and tendencies which promise to speed up needed improvements in education and to create mechanisms for change. (MF)

Describes a low cost hydrometer which can be assembled by students using stock laboratory items with a total retail cost of 17 cents. Includes list of required materials (with supplies) and experimental results on the instrument's accuracy. (JM)

Materials needed, reaction involved, and potential hazards are provided for a demonstration of reversible oxygenation. Also discusses the importance of the reaction in biological systems, focusing on hemoglobin/myoglobin and their function in mammals. (JM)

Describes development of microcomputer-controlled gamma scintillation spectrometer and chromatographic data analyzer, including design and construction of interface electronics and production of software. Includes diagrams of electric circuits and project evaluation indicating that both instruments functioned as intended. (JN)

Focuses on attributes of microcomputer systems which affect their usefulness in a laboratory environment. In addition to presenting general concepts, comments are made regarding the implementation of these concepts using a microprocessor-based data acquisition system developed at the University of North Carolina. (CO)

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 an application of solid-state memories in a laboratory course, which enables students to build electronic devices. Also introduces the fundamentals of analog-to-digital conversion and sampling theory. (CS)

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)

Outlines a variety of laboratory procedures, discussions, and demonstrations including in vitro contraction of muscle fibres and muscle proteins, sucrose density-gradient centrifugation, fern spore development, digestion of starch, construction of a small mammal trap, microscope selection, and occurrence and toxicity of mycotoxins. (GS)

Outlines a variety of laboratory procedures, discussions and demonstrations including the preparation and analysis of a square planar copper (11) complex, thermit reactions in a sand mould, product solubility, an aid for learning common oxyanions, thermal decomposition of nitric(v) acid. and nine others. (GS)

Outlines a variety of laboratory procedures, discussions, and demonstrations including a no-solder circuit board, damped to maintained oscillations with L-C circuits, polaroid strobe photos, resistive putty, soldering and circuit checking exercise, electromagnetic radiation, square pulses in C-R circuits, and testing an oscillating system. (GS)