Suggests the use of spores and spore-producing structures to show adaptations facilitating spore dispersal and dispersal to favorable environments. Describes several activities using horsetails, ferns, and mosses. Lists five safety factors related to use of mold spores in the classroom. (DS)

Describes a laboratory exercise which applies Koch's Postulates to a plant disease, bacterial speck. Includes an explanation of Koch's Postulate, list of equipment needed, advance preparation, outline of the three-week activity, and variations of the laboratory exercise. (DS)

Techniques are described for using living plants in the elementary science classroom including the germination and planting of seeds, transplanting seedlings, vegetative propagation, stem and leaf cuttings, and other plant studies. (DS)

An approach is suggested for teaching science history through inquiry training. A series of investigations are given for illustrating to students the manner in which organisms are grouped taxonomically. (SA)

Ideas intended for use in a high school biology laboratory are given. Swordtail fish are described as subjects for observation in animal behavior studies. (SA)

Describes how a class of 32 students can simulate the beating of a human heart by having the students themselves act out the various parts of the heart. (HM)

Discussed are the uses of sea urchins in research and their usefulness and advantages in the classroom investigation of embryology. Ideas for classroom activities and student research are presented. Lists 25 references. (CW)

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)

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)

A demonstration that can be used to illustrate diffusion and osmosis is presented. Discussed are materials, procedures, and an explanation for the effect. (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 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)

Explains an activity which can be used to compare the effect of temperature on the rate of chemical reactions to the metabolic reactions that take place within the body. Outlines directions and materials needed to perform the experiment. Lists a number of the body's defenses against extremely low temperatures. (RT)

Explains how a science teacher's experiences as a chimney sweep were used to provide new material for introducing and reinforcing scientific concepts. Photographs of chimney inhabitants were used as the raw data for student inquiries into the ecological processes taking place in and around chimneys. (RT)

Described are the techniques and results of using this tissue culture activity. Discusses the advantages of using such techniques in teaching alternation of generation life cycles to biology students. (CW)