Describes a science activity, using a bacterium and a fungus, to illustrate the effects of competition and barriers on geographical distribution. (Author/PEB)

Describes an experimental "accident" that resulted in much student learning, seeks help in the identification of nematodes, and suggests biology teachers introduce similar accidents into their teaching to stimulate student interest. (PEB)

Described are projects and observations that can be conducted with the laboratory mouse to study mammalian growth and development. (RH)

We compared the performance of three heuristics with that of subjects on variants of a well-known combinatorial optimization task, the Traveling Salesperson Problem (TSP). The present task consisted of finding the shortest path through an array of points from one side of the array to the other. Like the standard TSP, the task is computationally…

A method of instruction is presented in which learners construct their own understanding by engaging in experiments directed to solving specified problems. The method is based on how successful inventors learn and create new inventions.

Here is a pen-portrait of a new-style tertiary college, North Devon College, Barnstaple. (Editor/RK)

Contains a list of articles on the author's varied experiences in the south seas, among primitive peoples and with the cultural factors that have given her new insights with which to solve educational problems. (RK)

The development of the ability to associate numerals with sets of appropriate size was studied in children, ages 4 to 5-1/2. (ST)

Article described how students working towards a Bachelors degree in education volunteered to help relieve teachers of tasks that were not involved with instruction. (RK)

Contends that communication principles are learned more effectively through demonstration than through discussion. Demonstration experiements (e.g. effects of Delayed Auditory Feedback) and useful laboratory instruments are discussed. (MH)

Describes the procedure, equipment, results, and weaknesses of an experiment conducted by Nevil Maskelyne at Schehallien peak in Scotland; the purpose of the experiment was to collect data for the calculation of the mean density of the earth and to measure the universal gravitational constant. (MLH)

Mathematically analyzes the polarization of rainbows, a phenomenon which can be demonstrated in a laboratory simulation using polaroid sheets, perspex discs, and a white light source. (MLH)