Presented is a discussion focusing on teaching radioactivity in the schools. The author suggests equipment available and experiments that can be performed. (PEB)

A number of activities are described by which a class can collect biological data about the students in the class. Brief instructions are given. (RH)

Directions are given for activities designed to help children realize that linear measurement is continuous, that it involves the repeated use of a unit in the same way each time, and that measurement is approximate. Non-standard units as well as standard units are included. (DT)

The article provides helpful hints to the teacher who wishes to develop learning centers in his classroom. The author defines a learning center and tells how the center can be managed, how it should be begun, and the benefits it offers to the teacher. (HMD)

The authors promote the position that the benefits tend to exceed the pitfalls of dual facilitation of intense small group experience and should become a more standard feature of laboratory training, for reasons of new trainer development, better learning experience for participants, and continuing skill development of experienced trainers. (AJ)

A teacher and a librarian cooperated in designing a high school history independent study project. (PF)

A new approach to a research-oriented general chemistry laboratory is described. Objectives for the laboratory program are specified, details are provided concerning the program design, and the results of an experiment to evaluate the program are reported. (DT)

Describes an experiment designed to familiarize students with the operation of a precision spectrophotometer, the effects of changes in operating variables, and the characteristics of such components as sources and detectors. (SLH)

Describes an interesting, inexpensive, and highly motivating experiment to study uniform and accelerated motion by measuring the position of a car as it crashes into a rigid wall. Data are obtained from a sequence of pictures made by a high speed camera. (Author/SLH)

Described here is the implementation of a field experience sequence into a course entitled "Preschool and Primary School Physical Education." (Author/JA)

A required course for graduate teaching assistants on improving the quality of instruction in the undergraduate laboratories is described. As a principal feature of the course, the graduate students improved existing laboratory experiments or developed new ones. Both self-evaluation and evaluation by faculty members were applied to the final…