Discusses the benefits of thermochromic transformations for studying thermodynamic properties. Describes an experiment that uses a commercially available dye, attains equilibrium rapidly, employs a simple, single-beam spectrophotometer, and is suitable for both physical chemistry and introductory chemistry laboratories. (TW)

Describes an exercise that students can use to evaluate their intake of specific nutrients in relation to the Recommended Daily Allowance (RDA). Discusses the practicality and concepts involved in the RDA and procedures for dietary analysis. Provides a chart of the RDA and student worksheets for dietary self analysis. (CW)

Outlines the various activities students are involved in on Physics Students' Day at an amusement park and the mechanics of organizing this type of an event. Includes a real problem and the list of resource material. Suggests resource material for use with amusement park physics. (YP)

Describes a program to support lectures on analytical centrifugation, and to illustrate the manner in which useful analytical data about macromolecules can be obtained from simple centrifugation studies without the need for mathematical expertise. Discusses the background, methods, calculations, and results involved in this activity. (CW)

Shows how model rocketry can be included in physics curricula. Describes rocket construction, a rocket guide sheet, calculations and launch teams. Discusses the relationships of basic mechanics with rockets. (CW)

Discusses a unicellular component of hytoplankton that can easily be collected and studied in the classroom. Describes how to construct and use a diatometer. Suggests activities that can be done with diatoas collected outdoors or grown in an aquarium. (CW)

Describes the National Science Teachers Association's Every Teacher a Researcher (ETR) program as a way for teachers to get involved in research on the use of science laboratories. Includes a general description of the program and an application form. (CW)

Presents a hands-on activity to help primary, intermediate, and advanced students learn about and compare the general characteristics of reptiles and amphibians. Suggests "herp stations" to provide experiences. Details materials, background and procedures necessary for using this activity. (CW)

Uses simple models to illustrate the principles of this genetic method of mapping gene loci. Stresses that this system enables a practical approach to be used with students who experience difficulty in understanding the concepts involved. (CW)

Outlines the role of the main organisms involved in woodland decomposition and discusses some of the variables affecting the rate of nutrient cycling. Suggests practical work that may be of value to high school students either as standard practice or long-term projects. (CW)

Reports on the development of science curricula projects. Lists features that can be applied to programs developed at the local level. Includes programs from the Biological Sciences Curriculum Study, Educational Development Center, and Technical Education Research Centers. (RT)

Describes eight experiments involving the use of common consumer products that could be incorporated into quantitative and instrumental analysis laboratories. Discusses these activities in terms of illustration of principles, awareness, and critical thinking. (CW)

Discusses the incorporation of environmental chemistry topics into the traditional high school chemistry curriculum. Describes and provides lesson plans for the sulfur cycle and acid rain, and radioactivity and nuclear energy. Considers possible laboratory experiments. (CW)

Presents investigations to explore the substrate specificity, pH, concentration, and temperature relations of an enzyme with only inexpensive commercial rennet and basic laboratory equipment. Describes how the activities were carried out with a group of 15-year-old students. (CW)

Argues that "appropriate practical work" in mathematics aids understanding. Presents ideas and activities for teaching mechanics. Discusses modelling, problem formulation, and interpretation. (PK)