Described is an activity in which students learn how a battery produces electricity, why at least one electrode is destroyed when electricity is produced, and how electrolytes and temperature affect the process. Needed materials and directions for building a battery are listed. (KR)

Various aspects of photography using both transmitted and reflected light microscopy are described. Microscope configuration, preparation of samples for photomicrography, and the use of black/white or color film are discussed. (KR)

Directions for the building of a pocket microscope that will make visible the details of insect structure and living bacteria are described. Background information on the history of microscopes and lenses is provided. The procedures for producing various types of lenses are included. (KR)

Presented is a way to measure the sun's radiation by using a radiometer. Directions for building both simple and complex radiometers, circuit diagrams, and an explanation on how they work are included. (KR)

Describes an experimental procedure that can be used to determine the potential bacterial contamination of stagnant water in emergency laboratory eyewash bottles. Contains 11 references. (WRM)

Investigates effective technology-based education in the field of nursing in South Africa. Specifically describes and analyzes the results of an experiment to assess the value of using specialized hands-on equipment in nurse training and education as an addition to current computer-based training systems. (Author/WRM)

Describes experiments with electrostatics that are convenient for classroom demonstrations or laboratory activities. These experiments use a Kelvin balance and a relatively inexpensive electronic scale with 0.01-g sensitivity and essentially stationary pans. (WRM)

Begins with the procedure and results from an investigation on the effect of fluoride on the reaction between eggshell (substitute teeth) and dilute ethanoic acid. Describes an elegantly modified and improvised apparatus. (DDR)

Describes a series of 14 hands-on, low-cost exercises in plant sciences developed to support biology teaching and maintain student interest. Each exercise includes education objectives, biology background, detailed procedures, and topics to stimulate discussion and critical thinking. (DDR)

Argues that misunderstanding about the purpose of the salt bridge probably arises from a lack of explicit and adequate information in textbooks. Suggests a detailed teaching approach that describes the purpose of the salt bridge on the microscopic level. (DDR)

Discusses introductory polarized light measurements in which a diode laser pointer replaces the more frequently used polarized helium-neon laser. (WRM)

Presents guidelines for stocking, organizing, and maintaining a storage space for physics education laboratory and demonstration equipment. (WRM)

The feasibility of using current software, such as PC-Duo, PCAnywhere or LabVIEW, in training students in instrumental analysis from a remote location is investigated. Findings show that creation of online features is crucial to the use and learning by students and the development of a suitable Web site, which provides an easy-to-use interface to…

Micropipetting is an important skill that plays a very active and critical role in the molecular biology laboratory. It is imperative for a person handling micropipettor to know the correct way of using it so that accurate and precise results are achieved.

Galileo's discovery of the properties of pendulum motion depended on his adoption of the novel methodology of idealisation. Galileo's laws of pendulum motion could not be accepted until the empiricist methodological constraints placed on science by Aristotle, and by common sense, were overturned. As long as scientific claims were judged by how the…