Presents student methods for finding out the number of different squares on a chessboard. Includes extensions of the activity. (MKR)

Shows how to construct a cube using Origami techniques. Also shows how, by identifying analogous features, to construct an octahedron. (JN)

Presents a sequence of activities which serve to unravel the mystery of pi. In addition, the activities give meaning to circle relationships that formerly have been, at best, rotely learned. (JN)

A discussion is given of the nature of spatial ability and a rationale is provided for use of spatial activities such as tiling, tangrams, and polyominoes. (MP)

Activities designed to help mathematics teachers integrate information technology into lessons. Activities are based on using the software package !Draw. (MKR)

Reluctant learners made plastic geometric shapes for use in classroom activities. (SD)

A discussion is given of the technique used to create repeating patterns with interlocking congruent figures using reflection, rotation, translation, and glide reflection. (MP)

Describes a variety of methods for creating star patterns using overlapping rectangles of thin colored paper. (MKR)

This article offers a diversity of approaches for the conceptual development of the summation of the interior angles of polygons. Included are activities that suggest various possibilities for a study of angle sums that build upon an awareness of geometric transformations, particularly dissections and combinations. (JJK)

After a unit on Euclidean geometry which stresses both the development of intuition and the use of deductive methods, non-Euclidean concepts are introduced by having students read and consider science fiction stories. (SD)

Activities involving copying, enlarging, and translating stick figures can enhance students' understanding of graphs. (SD)

The author recommends the use of flow charting to help students understand the manipulation of algebraic formulae. He identifies some problems with flow charts and suggests an alternative method of constructing flow diagrams. (SD)

Describes investigations involving data acquisition and analysis using microcomputers running the LOGO programing language. Provides new primitives to add to LOGO to access information from the analog to digital converter of a BBC microcomputer, giving samples of student results. (JM)

Examines the study of transformations which result from cross-sections of a prism. The study involves some model-making, which in turn introduces some new problems of drawing and construction. The material is presented with the practicalities of classroom teaching in mind. (Author/JN)

Provides domino geometry problems, problems with arithmetic progressions, and magic pentagram sums. (JM)