Provides explanations of 15 experiments, laboratory activities, demonstrations, and lessons for use in instruction. Includes information on Daphnia, wild garlic, crystals, gas chromatographs, bleaches, alcohols, reactivity series, chemistry formula, electronic keyboards and waveforms, interference and diffraction gravity, Moire fringe patterns,…

Presents information in brief on changing priorities in science education. Cites three categories of aims for science, traits of underachievers, and the processes of science. Includes reflections on the Salter's GCSE Scheme of Assessment, the integration of science and drama, and a historical perspective of practical work in school science. (RT)

Teacher-directed versus student-oriented remediation methods in high school physics classes in Nigeria were compared using 121 fifth-form students. Formative, achievement, and intelligence tests were administered. Teacher-directed remediation treatment enhanced learning and was more effective than was a student-oriented method. (TJH)

Examines the effect of solar radiation on colored shingles. Describes the experimental procedure, results, and discussion. Presents a picture of the experimental arrangement and three graphs of data measured at different dates. (YP)

States that quantitative modelling allows teachers to concentrate more on qualitative understanding. Suggests the main benefits as (1) repetitive calculations are reduced allowing greater attention to be focused on underlying models; (2) more "what if" models can be tested; and (3) a wider variety of data can be used to test models. (MVL)

Discusses the advantages of using discrepant events in elementary school science classrooms in terms of motivation and problem solving skills. Describes the materials, procedures, and reasons behind five discrepant activities. (YP)

Examines if a self-paced, interactive microcomputer delivery system can decrease the time needed and improve the level of mastery as compared with a traditional self-paced instructional approach. Uses high school physics students with five activities and reports that no differences were found. (MVL)

Discusses the growth of computer networks in elementary and secondary schools and describes numerous benefits for both instructional and management functions. Topics discussed include ease of use; educational advantages; examples of use in physics, writing, and journalism classes; student records management; cost benefits; and greater efficiency.…

Discusses the results of measuring the in-class effectiveness of a computer-controlled instructor workstation (IWS) that was developed at the Air Force Academy. Treatments for the experimental and control groups in an introductory physics course are described, and effects on student performance, student attitudes, and instructor attitudes are…

Discusses the global change of climate. Presents the trend of climate change with graphs. Describes mathematical climate models including expressions for the interacting components of the ocean-atmosphere system and equations representing the basic physical laws governing their behavior. Provides three possible responses on the change. (YP)

Uses simple pulse NMR experiments to discuss Fourier transforms. Studies the generation of spin echoes used in the imaging procedure. Shows that pulse NMR experiments give signals that are additions of sinusoids of differing amplitudes, frequencies, and phases. (MVL)

Discusses the history and development of Plasma Desorption Mass Spectrometry to determine molecular weights and structures of proteins and polymers. Outlines theory, instrumentation, and sample preparation commonly used. Gives several examples of resulting spectra. (ML)

Describes a technique for separating samples that range over 15 orders of magnitude in molecular weight. Discusses theory, apparatus, and sample preparation techniques. Lists several types of field-flow fractionation (FFF) and their uses: sedimentation FFF, thermal FFF, flow FFF, electrical FFF, and steric FFF. (ML)

Identifies a common laboratory problem that causes instrumentation malfunction. Provides numerous experiences of researchers whose results have been affected by humidity fluctuations, magnetic field fluctuations, trucks driving by, and other factors. (ML)

Examines between-school variation in gender and ethnic inequality in course-taking of physics and biology. A multilevel analysis of 19,743 Israeli twelfth graders reveals the sciences are taken less often by underprivileged Jewish ethnic group students, physics is taken more often by males and biology by females, and gender typing is particularly…