This seventh in a series of twenty-nine learning modules on instructional execution is designed to give secondary and postsecondary vocational teachers skill in assisting student development of laboratory work plans, in guiding student progress through the use of these plans, and in developing special instructional materials for use in the…

This instructor guide contains 20 laboratory activities for grades 9-10 Agricultural Science I-II classes. The activities are cross-referenced to Missouri Core Competencies and Key Skills. The activities are organized into the following areas: introductory (microscope use); animal nutrition (absorption of nutrients, bacteria and disease, enzyme…

Describes a circuit by which capacitance and the dielectric constant can be measured. Shows the circuit diagram and the method to calculate these constants. (YP)

Presents a model system designed for the electrophysiological investigation of single unit activity in intact anaesthetized animals. Illustrates how information is coded into action potential patterns by sense organs. Uses the ampullary electroreceptor of the brown bullhead catfish as an example. (Author/CW)

Describes the Tardigrada as a group of animals suitable for close study in project work. Gives reasons for their suitability and an illustrated identification key. Discusses possible investigations into the ecology and physiology of tardigrades. (Author/CW)

Discusses responsibilities for providing safe experiments and for teaching about safety. Provides lists of references on chemical safety and regulated/potential carcinogens. Also discusses general laboratory safety procedures including waste disposal and recycling of solvents. (JM)

Several potential safety problems are identified relative to science teaching: the use of bottled gas or alcohol lamps as heat sources, the hazards of Millon's Reagent for testing for proteins, and the use of silicon tetrachloride to demonstrate properties of chlorides. Science teachers are also warned about potentially dangerous procedures…

The use of live animals in the secondary school laboratory is discussed along with suggestions for increasing the use of live animals and challenges to those teachers who restrict this use. (SA)

Discussed are the two sides to the question of laboratory dissections. Alternatives to dissection are proposed as well as the importance of incorporating dissections in a science curriculum. (KR)

Examines the effect of solar radiation on colored shingles. Describes the experimental procedure, results, and discussion. Presents a picture of the experimental arrangement and three graphs of data measured at different dates. (YP)

Uses a method which involves weighing out an amount of the appropriate weak acid or base and dissolving it in distilled water close to the final volume. Solution is then titrated with strong acid or base to give the desired pH. Provides three examples. (MVL)

Examines two computer interfaced lab experiments: 1) discusses the automation of a Perkin Elmer 337 infrared spectrophotometer noting the mechanical and electronic changes needed; 2) uses the Gouy method and Lotus Measure software to automate magnetic susceptibility determinations. Methodology is described. (MVL)

Reports on the teaching of recombinant DNA technology in high school biology courses. Explains reactions of the public, students, and colleagues to the molecular genetics unit. Indicates equipment, curricular materials, training, workshops, and availability. (RT)

Explains a method for keeping track of chemicals, supplies, and equipment by using a computer. Describes stockroom personnel, department needs, the physical plant, restocking procedures, file setup, and effectiveness of the program. Examples of sample inventory forms are included. (RT)

Summarizes several articles on safety in the science laboratory, an article on the science and history of chocolate, and an article on teaching nuclear physics from an historical perspective. (WRM)