Examines the controversy surrounding the validity and interpretation of electron microscope images. (DS)

Describes an experiment in which a recycling oscillator has been designed having a fiber optic data link that closes the loop. Outlines the use of this wink-around system to determine the speed of light and suggests additional application for measuring integrated circuit propagation delays to subnanosecond resolution. (GS)

Described is a fourth grade, Title I math lab program, operating in a small corner of a classroom with special emphasis on the lab activities utilized which stressed math skill development. The small area used for a math lab did not appear to hinder the program's effectiveness. (DS)

An exercise is presented which demonstrates the determination of sample purity by differential scanning calorimetry. Data and references are provided to enable the exercise to be carried out as a dry-lab experiment. (BB)

Presents the use of a Michelson interferometer in studies of visible spectroscopy. Discusses the experimental setup for obtaining reflectivity spectra of various semiconducting materials. (MLH)

Explains how to manage waste after a classroom laboratory experiment which generally has the potential to generate large amounts of waste. Focuses on pollution prevention and the selection processes to eliminate or minimize waste. (YDS)

Describes the application of an integrated-circuit (IC) chip which provides an easy-to-use, inexpensive, rugged, computer-interfaceable temperature sensor for calorimetry and differential temperature measurement. Discusses its design and advantages. (JRH)

Describes the development of new laboratory-based assessments to promote the professional development of technicians in education. Discusses defining standards, the new Scottish/National Vocational Qualifications, and awarding Arrangements. (JRH)