A description of an apparatus for demonstrating the trajectory of a charged particle, is given. A photograph of the equipment used in the demonstrations accompanies the text. (SA)

Presents a case in favor of having the teaching profession police its own ranks for the sake of curbing incompetencies. (GA)

Reviews some major developments of particular relevance to teaching, specifically, Information Processing System (IPS), and developmental psychology. Discusses the quality of both, educational research and science teaching, and gives recommendations for improvement. (GA)

Discusses students' current methods of studying physics, and offers concrete tips to guide them in studying physics effectively. (GA)

Some topics included are: the relative merits of a programmable calculator and a microcomputer; the advantages of acquiring a sound-level meter for the laboratory; how to locate a virtual image in a plane mirror; center of gravity of a student; and how to demonstrate interference of light using two cords.

Describes a simple method of measuring the refractive index of a liquid using a paper cup, a liquid, a pencil, and a ruler. Uses the ratio between the actual depth and the apparent depth of the cup to calculate the refractive index. (GA)

Discusses some of the basic theories in cosmology, such as Hubble's laws and the big-bang theories, and looks at some of the ideas of astronomers and scientists with respect to their evaluation of the future of the universe. (GA)

Discusses different approaches to the teaching of electrical resistance as presented by different authors of physics textbooks. Evaluates, compares, and expresses personal preferences for certain approaches. (GA)

Investigates and explains the phenomenon associated with Rubens flame-tube demonstration, specifically the persistance of flames at regular intervals along the tube for few minutes after the gas is turned off. (GA)

Explains interference colors in thin films as being due to the removal, or considerable reduction, of a certain color by destructive inteference that results in the complementary color being seen. (GA)

Describes few heat demonstrations where the use of a coolant spray could enhance their effectiveness. (GA)

Discusses the principal of formation of shadows, and the speed involved with their appearance or disappearance. (GA)

A qualitative demonstration of wave motion along a linear spring is being used, quantitavely, to present three methods of measuring the phase velocity of the waves. (GA)

Discusses the effect of vehicle mass on stopping distances. Analyzes an example of a sample vehicle and tire, and calculates the braking acceleration showing the effect of different factors on the stopping performance of the tires. (GA)

Describes and evaluates the Tel-X-Ometer, its performance, and its accessories. The apparatus, with its low intensity x-ray beam, is specifically designed to make x-ray experiments safe, practical, and affordable for the students. (GA)