Activities using egg cartons to teach addition, subtraction, different bases, and probability are described. (DT)

The activity of making a set of Logic Blocks is used to lead to a discussion of families of polygons and to questions about tessellations. (DT)

Notes on divisibility using manipulative materials, cyclic groups of functions, Horner's method of synthetic division, arc lengths of cycloids and cardioids, number squares, and students' concepts of mathematics. (MM)

The author describes a home-made manipulative aid which provides practice in addition. (MM)

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)