Described is a demonstration which involves the ingrowth of members of the radon-222 decay series. Laboratory procedures, equipment, analysis, and results are discussed. (CW)

Described is a simple and interesting chromatography experiment using three different fluorescence detection principles for the determination of caffeine, saccharin and sodium benzoate in beverages. Experimental procedures and an analysis and discussion of the results are included. (CW)

Described is how tests that accompany texts can be effective if items selected relate to topics stressed in class. Identified are problems commonly found in these types of tests and directions on how to improve problem questions. (KR)

The integration of videodisc technology into the elementary school science classroom is discussed. Stressed are the restructuring of the classroom, creating a positive learning atmosphere, and extending the roles of the teacher and the student. A checklist for successfully integrating videodiscs into the classroom is provided. (CW)

The advantages of the use of videodiscs in elementary school science are stressed. A basic videodisc system is described. Questions to ask before investing in a videodisc system are suggested. Teaching techniques using the videodisc are discussed. (CW)

Presented are two lessons which illustrate acceleration for elementary school students. A poster for use in these activities is provided. Teaching methods used in these lessons are discussed. Student questions concerning automobile racing are presented with answers. (CW)

An interactive computer-assisted learning program written for the BBC microcomputer to teach the basic principles of genetic engineering is described. Discussed are the hardware requirements software, use of the program, and assessment. (Author/CW)

Two designs of undergraduate terrestrial ecology and behavior field courses are described and compared. These include using a variety of projects and using a single individual research project. The relative educational benefits of each are considered and the advantages of each type of course are discussed. (Author/CW)

Presented is a guide for students planning to do a science project. Discussed are preliminary organizational matters, report plans, choosing topics, setting up procedures, time management, and documentation. The most important steps for producing a successful project are summarized. (CW)

Discusses the difficulties which students have in interpreting science diagrams and the ways in which some diagrams may be misleading. Presents several diagrams as examples. (YP)

Described are two activities designed to help children investigate electrical charges, electric meters, and electromagnets. Included are background information, a list of materials, procedures, and follow-up questions. Sources of additional information are cited. (CW)

Presented is a collection of terms associated with fourier transformations in chemistry. These terms are cross-referenced to a four-part article in the "Journal of Chemical Education." (CW)

Described is an experiment which is designed to investigate the reaction of the protein ferrimyoglobin with fluoride. The activity uses readily available apparatus and the technique of optical absorbance for measurement of concentrations. Experimental design, procedures, and treatment of the equilibrium data are detailed. (CW)

Describes three demonstrations showing chaotic motion, which makes long-term prediction impossible. Discusses the apparatus for the demonstrations and procedures for illustrating chaotic motion of pendulum, balls rolling in a double potential well, and a ball rolling on a balanced beam. (YP)

Summarizes the evaluation of computer software presented in "The Physics Teacher" since 1984. Describes several programs for integrating courseware use into classes including "TimeLog" for a message/bulletin board, Control Data "Physics 1" for problem solving, some demonstration programs, and "Physics Laboratory Programs" for programing skills.…