Described is an activity in which the transmission of disease is simulated by the students in the classroom using common solutions. Discussed are materials, preparation, procedures, and questions for classroom discussion. (CW)

Described is an experiment which illustrates valence isomerization, the trapping of a reactive intermediate and retrosynthetic analysis applied to the Diels-Alder reaction. Included is a background discussion, experimental procedures, and a discussion of the analysis. (CW)

Two exercises on the dispersal of tree seeds by the wind are presented. Procedures, equipment, and analysis for the still air and wind dispersal activities are described. Nineteen references are listed. (CW)

The construction of a wooden model of the musculoskeletal system which can be used to investigate the physical properties of muscles without sacrificing laboratory animals is presented. Six activities are included with answers. Additional activities are suggested. (CW)

Uses reversible electrochemical cells near equilibrium to study basic thermodynamic concepts such as maximum work and free energy. Selects sealed, miniature, commercial cells to obtain accurate measurement of enthalpy, entropy, and Gibbs free energy. (MVL)

Discusses the use of computer-illustrated texts to teach statistics at the college level. Microcomputer-based software that can be used in the areas of calculation, graphics, simulation, animation, and text presentation is described; and use of the software for lectures, laboratory use, and tutorials is discussed. (three references) (LRW)

Described is a project in which students find a living population in their community and either study it in the field or bring it into the laboratory for study. Seven example projects are suggested. (CW)

Described is a science activity which illustrates the principle of uncertainty using a computer simulation of bacterial reproduction. Procedures and results are discussed. Several illustrations of results are provided. The availability of a computer program is noted. (CW)

Described are the experiences of one teacher with the teaching of writing in college level microbiology, virology, and immunology courses. Assignments, methods, evaluation, and student responses are discussed. (CW)

Presented is an activity designed to help students understand and appreciate the scale and order of the geologic timetable and begin to infer a relationship between biologic, chemical, and geological events. Procedures, background information, student worksheets with answers, and a list of materials are included. (CW)

Directions for the construction of an electronic version of an electroscope are provided. Demonstration and operation of this apparatus is discussed. A list of components and a schematic diagram are provided. (CW)

Described is an experiment in which students are able to synthesize an unnatural compound having the odor and flavor of coconuts. Laboratory equipment, procedures, and analysis of the product are discussed. (CW)

Described is an alternative method of culture isolation that uses streaking on specialized media. An activity in which different media are tested for selectivity is presented including a list of materials and procedures. A chart of colony morphology is given. (CW)

Discusses the relative danger from toxicity of some typical chemicals. Notes that some materials in solutions have low toxicity, but in dust form have high toxicity. Suggests that more chemical compounds should be treated as the dangerous compounds they are. Lists common compounds found in the lab. (MVL)

Describes laboratory-oriented software programs that are short, time-saving, eliminate computational errors, and not found in public domain courseware. Program availability for IBM and Apple microcomputers is included. (RT)