At all levels of instruction commonplace items such as fruit, gelatin, golf and tennis balls, and sugar cubes can be used to demonstrate geographic concepts such as earth-sun relations, locative grid, structure of the earth, glaciation. Tactile and visual demonstrations in which students participate are more effective than other alternatives. (NH)

Use of geoboards and geo-islands to teach naming fractions, equivalent fractions, and operations with fractions is described. (MNS)

Two experiments were conducted to examine behaviors that characterize play with convergent and divergent materials and the effects of play on convergent and divergent problem solving among 64 3- and 4-year-olds. (Author/RH)

Using a geoboard to find polygons with given perimeters presents a problem which refines skills and provides an opportunity to inquire and discover. (MK)

Advocates the use of classification activities in the elementary school curriculum as a means of developing thinking skills in children. Critical preclassification skills, classification activities (including simple and multiple classification), and classification tasks and materials are discussed. (Author/RH)

The purpose of this article is to stimulate a discussion about the teaching of algebra. It seeks to raise questions which are more fundamental than those so far generated by the manipulative skills debate. (Author/MK)

Suggests discovery activities in spatial awareness for elementary math, utilizing home-made geometric shapes and soma cubes. (SJL)

Describes and illustrates games and game settings used in two observational projects dealing with game play by young children. One project presented games encouraging use of strategies; the other provided game equipment and invited the children to invent their own rules and playing procedures. (DS)

A number of paper-folding activities are described. The activities illustrate geometric concepts, theorems, and construction techniques. (SD)