Revised version of a paper presented at the Conference on Twentieth-Century Bulgarian Literature, George Washington University, Washington, D.C., October 28-30, 1971. (RS)

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)

Includes a simple technique to demonstrate Millikan's oil drop experiment, an environmental studies experiment to measure dissolved oxygen in water samples, and a technique to demonstrate action-reaction. Science materials described are the Pol-A-Star Tomiscope, Nuffield chemistry film loops, air pucks and pH meters. (JR)

Discusses theories underlying Newtonian and non-Newtonian fluids by explaining flow curves exhibited by plastic, shear-thining, and shear-thickening fluids and Bingham plastic materials. Indicates that the exact mechanism governing shear-thickening behaviors is a problem of further study. (CC)

Discusses the need for engineers in today's educational programs and their possible contributions to the education field. (CC)

Photographs of the earth taken from space are used to illustrate the advantages and application of remote sensing. This technique may be used in such areas as the immediate appraisal of disasters, surveillance of the oceans, monitoring of land, food and water resources, detection of natural resources, and identification of pollution. (JR)

Analyzes trends in the research and development spending on the basis of a survey of chemical makers made by the Chemical and Engineering News. Indicates the presence of a modest upturn in 1973 in the basic chemical industry even in constant dollar terms. (CC)

Discusses the nature of environmental education and identifies five major themes common to most environmental teaching materials. Advocates the need for a unifying theme in environmental education, and suggests that the discipline should be conceptualized around a model of decision-making.'' (JR)

Ideas for education concerning American attitudes toward developing countries and resolution of such worldwide problems as poverty and population are presented. These are designed to help students appreciate various dimensions of development related to their own world. (SM)