Describes the application of an inexpensive relaxation oscillator circuit which uses a thermistor or a cadmium-sulfide photocell to affect the rate of an audio pulse output. It is especially well suited for qualitative and quantitative measurement of heat or light in classroom situations because of its clearly audible output. (Author/JR)

Discusses the development of a design task in which the students can focus on problems in some part of the city. Describes such an improved strategy for teaching the design of complex systems as challenging and beneficial, especially for those interested in urban-related careers. (CC)

Directions are given for the construction of mazes suitable for use in the classroom. The animal maze may be used to investigate small animal behavior, and the finger maze provides students with the opportunity to experience similar frustrations to those encountered by animals in the network of passages. (JR)

Discusses the establishment of an environmental systems laboratory at the University of Pittsburgh with the support of the Sloan Foundation. Indicates that the "real world" can be brought into the laboratory by simulating on computers, software systems, and data bases. (CC)

Discusses interdisciplinary design engineering programs conducted at the Polytechnic Institute of New York, especially the internship program, Sloan Foundation projects, and the characteristics of design engineering centers. Included is a list of completed projects. (CC)

Discusses the principles, construction, and operation of an apparatus which serves to demonstrate the non-colinearity of the angular velocity and momentum vectors as well as the inertial tensors. Applications of the apparatus to teaching of advanced undergraduate mechanics courses are recommended. (CC)

Reviews the basic theory underlying the lift and drag forces of a magnetically levitated vehicle riding over a continuous sheet guideway. Included are descriptions of the future vehicle characteristics and the students' construction of a superconducting magnetically levitated merry-go-round demonstration apparatus in a laboratory experiment. (CC)

Discusses the offering of a course in chemical and industrial hazards for junior and senior chemistry majors at City College of New York in 1972. Suggests inclusion of laboratory and industrial safety education as a formal part of chemistry or science curricula. (CC)

A description is provided of activities for a junior high school science and social studies unit on teaching the scientific method and interrelationships between the scientist and the social scientist. (Author/KM)

Presents ideas from readers on techniques and equipment that might be useful in teaching secondary school science. Suggests how to construct cheap wall charts, modify a vacuum cleaner into a blower, construct a stereo microscope lamp holder, and outlines simple physics laboratory experiments. (JR)

Considers the role of languages and European culture in developing language programs. (RK)