Describes experiments using crude isolated chloroplast fractions which demonstrate some aspects of the photosynthetic light requiring process and a number of factors affecting them. These experiments are suitable for senior high school and college courses in biology. (JR)

The organization of a project on the topic of communications is detailed, and examples of some of the workcards used with the project are provided. Two open'' problems along with some student responses are also included. For the first article in this series, see Volume 1 Number 7 pp9-10, November 1972. (DT)

Describes a laboratory-based, individual-progression, introductory physical science course designed for elementary education majors and for meeting general education requirements. The course is designed to examine how we know and why we believe" and to convey some sense of the nature, successes, and limitations of scientific thought." (AL)

The rules, equipment, and procedures for a game to teach clock reading are described. (DT)

Directions are given for activities that introduce students to determining the total surface area of rectangular prisms. A worksheet with 18 problems, plus a puzzle problem, is included. (DT)

Worksheets on constructing the circumcenter, the centroid, the orthocenter, the incenter, and the Nine-Point Circle in a triangle are provided for duplication. (DT)

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