Two teachers describe ideas they have used in teaching the concept of area. The use of physical materials is emphasized. (MM)

Describes the use of a performance test developed to assess students' problem solving ability and some practical skills in chemical analysis. (Author/AL)

The 4-1-4 semester scheduling of courses at colleges and universities. (IR)

Reviews three audiovisual instructional aids, providing information on time, format, catalog number, price, and supplier. "Distillation: Simple and Fractional,""The Periodic Table," and "Manmade Macromolecules" are considered to be excellent materials for secondary school chemistry classes. (JN)

Describes equipment and procedures for an experiment using diodes to introduce non-linear electronic devices in a freshman physics laboratory. The experiment involves calculation and plotting of the characteristic-curve and load-line to predict the operating point and compare prediction to experimentally determined values. Background information…

Describes a simple apparatus and provides instructions to do relative index of refraction measurements/calculations and to show mathematical relationships betwen indices when light travels from one liquid to another. A listing of a computer program (in BASIC) which will analyze data is available from the author. (JM)

Presented are procedures for demonstrating the production of color oscillations when nitric acid is added to a formic acid/concentrated sulfuric acid mixture. Because of safety considerations, "Super-8" home movie of the color changes was found to be satisfactory for demonstration purposes. (JN)