Describes a group of chemistry experiments designed to convey to students the real and measurable nature of certain mathematical concepts. (BR)

Describes the difficulties that arise from teaching science to mixed ability groups where individualized instruction is emphasized. (BR)

Describes laboratory exercises with chickens selecting their food from dyed and natural corn kernels as a method of demonstrating natural selection. The procedure is based on the fact that organisms that blend into their surroundings escape predation. (BR)

Describes a demonstration with mothballs that simulates the ballast mechanism of a fish air bladder. (BR)

Describes the use of storage oscilloscopes in five physics experiments, in lecture demonstrations, and in improved measurement techniques. (GS)

One way to motivate students' interest in physics is to teach it in the context of medicine. Optics, for example, can be taught with examples from the eye. For many years simple optics of lenses has been taught using a model of the eye. However, recent advances in using lasers for ophthalmological (ocular) examinations can be used to increase…

Traditionally, the Doppler effect for sound is introduced in high school and college physics courses. Students calculate the perceived frequency for several scenarios relating a stationary or moving observer and a stationary or moving sound source. These calculations assume a constant velocity of the observer and/or source. Although seldom…

Presenting research and experimentation (R & E) as an industrial arts content area enables the student to develop both the manual and mental skills necessary to survive societal changes. Problems in its presentation are considered and the role of R & E in industry is described. (AG)