Describes a sixth-form field course consisting of written materials for students and a teacher's booklet giving necessary techniques, lists of apparatus, and practical hints. The course aims to estimate energy flows in a woodland ecosystem by means of a series of practical sessions involving field/laboratory investigations and calculations.…

Describes the processes involved in clinical urinalysis and relates them to possible high school biology classroom uses. (CS)

Outlines advantages derived from constructing and using a Projectable Basic Electronics Kit and provides: (1) list of components; (2) diagrams of 10 finished components (resistor; capacitor; diode; switch; bulb; transistor; meter; variable capacitor; coil; connecting terminal); and (3) diode and transistor activities. (JN)

Examines hydraulic jumps and suggests several simple experiments which can be carried out with limited equipment. (DS)

Presents content information and/or laboratory procedures and experiments on different biology topics including small-scale cultivation of watercress and its use in water-culture experiments, microbiology of the phylloplane, use of mouthbrooders in science class, and the gene. (DC)

Discusses the problem of ellipticity in the motion of the ordinary Foucault pendulum and the error caused by it. Presents a simple method of slightly modifying the force-displacement relation in such a way that precession does not result from ellipticity. (Author/SK)

Described is a procedure for assessment of student performance in laboratory work (practical work) in Advanced Level Biology in England. Some historical background is included. (PB)

Discusses the nature of light-producing reactions and provides a procedure for demonstrating chemical luminescence using siloxene indicator. Indicates source of this chemical and safety precautions. (SK)

Compares between the component and the modules (system) approaches which are used to teach electronics at Croydon High School, Australia. The author presents some personal views from his experience of teaching both ways. (HM)

Provides information regarding the extra bands of color, termed supernumerary arcs, that sometimes accompany a natural rainbow. Several experiments are described that elucidate the phenomenon of supernumerary arcs, involving the illumination of a hanging water droplet with white light from a projector or monochromatic light from a helium-neon…

Describes a straightforward vertical fall experiment using a badminton shuttlecock, a tape measure, and a millisecond timer. The effects of air resistance are important and directly measurable. The experimental data best fit a predictive model which assumes a resistive force quadratic in the instantaneous speed of the falling object. (GS)

Describes different evaluation techniques of student performance in the science laboratory. Evaluation techniques discussed include written reports, test items, practical tests, and observational assessment to evaluate both student performance and to promote development of specific skills. (DS)

Describes a nuclear debris collector which removes trace substances from the lower atmosphere during rainfall. Suggests that the collector could be implemented into courses at various educational levels and could result in developing a network for monitoring the geographical extent of nuclear contamination. (Author/SA)

The traditional experimental-control group method for evaluating delinquency prevention programs is questioned. It is contended that the method harms the intervention and exacerbates the deliquency problem. (JKS)

Describes a simple experiment for measuring the speed of sound using a partially filled beer bottle as a resonator. Outlines and discusses the approximations made in arriving at the procedure. (GA)