This is a position paper on the place of training in group process and participation in groups as part of teacher education. (Editor/RK)

Two percent agar gel is reported as a better medium for germination and growth studies. Students can be encouraged to undertake many simple experiments and make precise observations by using this medium. (PS)

Several ideas are proposed for chemistry teachers to try in their classrooms. Subjects included are polymerization of acrylate, polymerization of styrene, conductivity, pollution, preparation of chlorine, redox equations, chemiluminescence, and molecular sieves. (PS)

Ideas are proposed for physics teachers to use in their classrooms. Subjects include: alpha particles, spectrometer experiments, refractive index of glass, measurement of surface tension, projectile motion, and radiant heat. (PS)

Describes eighteen ways in which balloons may be used as a teaching tool in demonstrations and discovery exercises in science. (JR)

Outlines a laboratory course entitled Inorganic Chemistry for Biological Sciences'' which is designed primarily for juniors in biochemistry, physiology, and soil sciences. Inclusion of relevant environmental topics is indicated. (CC)

Describes a technique for comparing the number of bacteria in various soil samples. The equipment and materials are readily available, and the technique is suitable for high school students. (JR)

Summarizes the thermodynamics of macromolecular systems, including theories and experiments of cyclic energy conversion with rubber and collagen as working substances. Indicates that an early introduction into the concept of chemical potential and solution thermodynamics is made possible through the study of the cyclic processes. (CC)

Discusses the use of self-instruction in conducting a college laboratory program in biology. Six different laboratory exercises are set up in carrels, and students rotate around the carrels as they individually complete each exercise. (JR)

Describes a method for measuring osmotic potential which is suitable for high school and college biology classes. This method introduces students to the hard-to-visualize technique of using density gradients to separate cells or cell constituents of differing densities. (JR)

Describes two experiments in physiology using a readily available marine vertebrate, the flounder. Representative results are presented from experiments which measure the effect of excess potassium on the flounder EKG, and the effect of temperature on heart rate of the starry flounder. (JR)