Suggesting advantages of using forests to teach succession, briefly outlines procedures for gathering evidence of succession including numbers, ages, and sizes of trees. Five plot studies conducted by students at the University of Victoria are also described. (DC)

Describes a 10-step model for analyzing lessons involving data processing, including a set of activities for early elementary and middle school grades. Each set provides examples of relevant questions, directions, and explanations. (Author/DC)

Proposes the use of schoolyard activities as a viable alternative to extended field trips for field investigations in biology. Describes and provides examples of different approaches including a problem oriented technique, Outdoor Biology Instructional Strategies (OBIS), and a sourcebook sponsored by the Council for Elementary Science…

Suggests that current approaches to mechanics following Newton's laws will not improve by better presentations due to conceptual difficulties of the approaches. Offers an alternative way of setting up mechanics which avoids some of the conceptual pitfalls but still requires mathematical ability. (Author/SK)

Two presentations at the 1981 International Conference on Chemical Education are summarized: (1) current and future rationales for chemistry instruction and use of Gowin's V for more effective chemistry teaching and (2) creative adaptability toward challenges of chemistry content, society, and the individual, focusing on learning chemistry by…

Describes an interdisciplinary classroom activity to explain the effect of the ocean on local weather incorporating principles from physics, chemistry, mathematics, and meteorology. (DS)

Explores several options and advantages of using microcomputers in science teaching. Describes programs for calculating pH, Maxwell-Boltzman distribution of velocities in a gas, atomic orbitals, and lattice energies. Also suggests use of microcomputers in the areas of simulations, scoring tests, and controlling stock. (DS)

Provides directions for constructing a wooden or metal weather vane. Also describes the construction of a "Boomerang Drum," a machine which can store and release energy, and suggests activities for use with it. (DS)

Provided are details for a game designed to help secondary school or college students understand the types of problems encountered in applied hydrobiology and the financial and time constraints involved in their solution. (PB)

Describes experiments using solid state detectors in modern physics courses. The apparatus involved is simple and inexpensive, avoiding costly electronics, and the very high efficiency of plastic detectors in particular makes them ideally suited for work with very weak radioactive sources. (Author/SK)

Describes the diffusion of water molecules with terminology adopted from the physical sciences. Presents a set of student exercises (with answers) relating to the topic. (SK)

Describes equipment, activities, and experiments useful in biology and environmental education instruction, including, among others, sampling in ecology using an overhead projector, the slide finder as an aid to microscopy, teaching kidney function, and teaching wildlife conservation-sand dune systems. (SK)

Summarizes "you do it" activities presented at the 1978 South Australian Science Teachers Association Conference. Topics include microscope use and maintenance, chemical slide cells, chemical models, sound waves, microwaves, astronomy, plant keys, reading geological maps, and natural dye processes. (DS)

Structure of physics can be treated as an instructional variable by teachers who make the choices: defined versus derived concepts, operational versus paraphrase definitions, and theoretical versus empirical relationships. Operational definitions and empirical relationships are recommended for beginning students; paraphrase definitions and…

Describes a systematic investigation of the understanding of the concept of acceleration among students enrolled in a variety of introductory physics courses through individual demonstration interviews. Describes and identifies some conceptual difficulties and discusses some implications for instruction. (Author/SK)