this article presents a way to stimulate the study of some properties of numbers. The number of points on the star to be drawn is predicted using the number of teeth on each wheel, the greatest common factor of those numbers, and the number of teeth in the movable wheel. (Author/KM)

Describes two methods for the direct observation of soil-dwelling micro-organisms. One method is for relatively dry habitats and the second, for permanently wet habitats. (GS)

Describes an approach which emphasizes the physical aspects of periodic phenomena, and is explicit about whether the time or space domain is being treated. (Author/GS)

The author describes a model for operations on the set of rationals. Thi s model, used by students in a laboratory situation, is based on an easily constructed number balance. (SD)

Describes a chemistry curriculum for college freshmen that uses laboratory study of the chemical composition of meals eaten by students as the central activity from which theoretical and practical learning are derived. Presents a meal analysis flow diagram and a table of concepts included in the program. (GS)

Describes the inexpensive construction of an uptake volume potometer uptake and loss potometer, and experiments on plants that can be conducted with the equipment. (BR)

Incorporating creative play in the writing lab or classroom is a unique way to pique students' interest and boost their imagination. Exercises varying from describing Hershey's Kisses®, to using tape recorders for discussing voice, to using magnetic poetry to practice grammar are all ways that stimulate learning through the lens of play. Play…

This article describes a tree project undertaken by a class of 5- to 7-year-old children in the Child Study Centre at the University of Alberta. Following a description of the school and the children, the article discusses how the project evolved and discusses the three phases of the project. Photographs taken during the project are included.

A reaction kinetics experiment for the chemical engineering undergraduate laboratory course was developed in which in-situ Fourier Transfer Infrared spectroscopy was used to measure reactant and product concentrations. The kinetics of the hydrolysis of acetic anhydride was determined by experiments carried out in a batch reactor. The results…

An individualized program using programed materials, diagnostic testing, and self pacing was developed to accommodate the wide variety in mathematical backgrounds of junior college students. Results of this program are discussed. (SD)