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

Activities for which paper strips are used to make geometric figures to practice measuring, and to create artistic designs are described. (JT)

Children's perception and understanding of three-dimensional figures and of operations on them is discussed. Piaget's findings are reviewed and more current research is described. Classroom implications are explored. (SD)

The experiences of elementary teachers who invited their students to verify geometric theorems prior to the introduction of protractors form the basis of a pedagogical strategy for a sequence of learning activities offered here. Discussion focuses on the students learning strategies about angle concepts utilizing the dynamic interpretation of a…

Homemade geostrips, "angle-fixers" (cardboard circular sectors) and brass fasteners can be used by students to explore properties of angles, triangles and other polygons. Several games and other activities are suggested. (SD)

The number concepts of greatest common divisor and least common multiple are related to star patterns created through line designs. (JT)

A variety of methods for indirectly measuring the height of a flagpole are described for classroom use. (JT)

A description of a planet in the shape of a cube where everything was built from squares and parts of squares is presented. The story is used as a background for several paper folding exercises that explore several geometric shapes. Solutions to the problems stated are included. (MP)

Learning activities based on a geometrical puzzle that consists of rearranging triangles and trapezoids are used to teach concepts involving area. (MP)

In using manipulative materials in an elementary mathematics classroom, each student can be placed in a cooperative-task group, with each member of the group interdependently performing a specific function. This article describes in detail an activity utilizing pentominoes that demonstrates how such a classroom management system can be…

Presents a unit of study involving tangrams that integrates geometric relationships, scale drawings, graphing, patterns, and logical thinking. Provides worksheets for independent and cooperative activities to discover geometric shapes using a specified number of tangram pieces. (MDH)