Advice concerning setting up a center for materials related to the metric system is offered. (SD)

Many concepts can be introduced informally through activities. Among those which can be investigated using easily-made 10-by-10 pegboards are geometric shapes, coordinate systems, grouping and regrouping, and addition of two-place numbers. (SD)

The author proposes a method of diagnosis through activities rather than traditional testing. In this approach the teacher assigns activities in which the student is known to have an interest and which require the skill to be tested. (SD)

Summarizes the results of a 1969 experiment survey made for learning the impact of special publications and the trend of experimentation in colleges. Describes some new or modified apparatus that has appared since the 1956 survey. (GS)

Twelve activities are presented that focus on a common phenomenon of a child's world: energy. These activities relate energy, how it occurs, how it is used, and how to use it safely. Each activity includes the purpose, introduction, background, procedure, materials, estimated time for the activity, typical results, safety notes, and more ideas.…

Perspectives, policy issues, and options for Congressional action that relate most directly to the development and implementation of alternatives to animal use in research and testing are addressed in this report. Testimonies and reports include those from the Office of Technology Assessment, the National Institute of Health, and the Food and Drug…

This booklet introduces high school and junior high school students to the major groups of aquatic insects and to population sampling techniques. Chapter 1 consists of a short field guide which can be used to identify five separate orders of aquatic insects: odonata (dragonflies and damselflies); ephemeroptera (mayflies); diptera (true flies);…

Slope Stability is one in a series of single-topic problem modules intended for use in undergraduate and earth science courses. The module, also appropriate for use in undergraduate civil engineering and engineering geology courses, is a self-standing introduction to studies of slope stability. It has been designed to supplement standard…

This booklet was produced in response to the growing need for reliable environmental assessment techniques that can be applied to small-scale development projects. The suggested techniques emphasize low-technology environmental analysis. Although these techniques may lack precision, they can be extremely valuable in helping to assure the success…

Describes the construction of a model suitable for demonstrating the principles of refrigeration in secondary science classes. (JR)

Describes two experiments in physics, using the same inexpensive apparatus, that may be performed as projects by high ability secondary science students. (JR)

This manual is intended for professional personnel in the fields of water pollution control, limnology, water supply and waste treatment. Primary emphasis is given to practice in the identification and enumeration of microscopic organisms which may be encountered in water and activated sludge. Methods for the chemical and instrumental evaluation…