Describes the nature of elementary particles, quarks, leptons, and bosons. Indicates the possibility of a fourth family of quarks. Predicts the nature of the lepton relatives. (YP)

Describes experiences with turtle graphics to demonstrate motion in a constant gravitational field. Provides the computer program and typical diagrams. (YP)

Describes two computer simulation programs, "Nerve Physiology" and "Frog Heart," as practical alternatives to the use of live animals in class experiments. Discusses the potential of computer simulation as a feasible alternative to experiments with animals in the classroom laboratory. (CW)

Describes five computer software packages; four for MS-DOS Systems and one for Apple II. Included are SPEC20, an interactive simulation of a Bausch and Lomb Spectronic-20; a database for laboratory chemicals and programs for visualizing Boltzmann-like distributions, orbital plot for the hydrogen atom and molecular orbital theory. (CW)

Compares knowledge and attitude levels of elementary, secondary science, and other secondary teachers on water resources. Evaluates an interactive computer simulation, the "Water Resource Management Simulator" (WRMS), as a training tool for inservice teachers. Users of WRMS exhibited higher knowledge scores than nonusers. No differences…

Computers, because of their computational speed and multi-representational capabilities, are particularly well-suited to the implementation of dynamic models. This paper reviews research conducted on the use of computer-based models in precollege science classrooms. Topics addressed include Investigations of Running Simulations, Investigations of…

Described is the generation of a scale model of the solar system and the milky way galaxy using a computer spreadsheet program. A sample spreadsheet including cell formulas is provided. Suggestions for using this activity as a teaching technique are included. (CW)

The existing methods for graphically illustrating projection and coordinate systems for manual and computer-aided drafting and design are examined. Inconsistencies in methods used to graphically depict first and third angle projection in texts and the lack of attention in the relationship of projection to coordinate systems are noted. (KR)

An algorithm is described for generating smooth curves of first-order continuity. The algorithm is composed of several cubic Bezier curves joined together at the user defined control points. Introduced is a tension control parameter which can be set thus providing additional flexibility in the design of free-form curves. (KR)

The focus of this article is on how computer graphics can be integrated throughout the engineering graphics curriculum to increase visual perceptual skills. Visual perception is defined, the need to develop it is described, and methods which engineering graphics educators can use to develop it are outlined. (KR)

Described is a computer program that, by means of a simple motor task, provides a context that enables students to learn about motor coordination. The effects of alcohol, drugs, or solvents on the motor task can be investigated using a delay in the feedback loop. A description of the hardware and software is included. (KR)

Investigated the effects of studying an ecological system via computer simulation on 14- and 15-year-old students' (n=9) abilities to pose hypotheses; control and manipulate variables; and learn via icon, graph, and table display formats. Working with a simulation encouraged students to think hypothetically and test their hypotheses by controlling…

The assumptions common to all capture-recapture models for estimating population size are reviewed. A simulation using either a playing board, counters, and dice or computers is described. Classroom implications of using the board game are discussed. (KR)

Illustrated is the use of spreadsheet programs for implementing finite difference numerical simulations of chromatography as an instructional tool in a separations course. Discussed are differential equations, discretization and integration, spreadsheet development, computer requirements, and typical simulation results. (CW)

This meta-analysis investigated how effective computer-assisted instruction (CAI) is on student achievement in secondary and college science education when compared to traditional instruction. Results showed a small positive effect for CAI use when used in simulation or tutorial modes, with individual computer use, and when used as a supplement to…