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)

Teaching by learning activities is contrasted with teaching by objectives. Four types of learning activities are identified. (JT)

A series of activities that focus on the process of measuring are presented. The material is designed to help children develop a concept of measurement by leading them through the processes used in establishing formal measurement systems over the centuries. (MP)

A unique problem solving activity involving student lockers in a junior high school is presented. The activity embodies numerous mathematical concepts and has successfully motivated pupils to explore related mathematical ideas. (MP)

Presents three hands-on, discovery geometry lessons based on the use of special pieces called Polydrons by a fifth-grade class to build and investigate special properties of polyhedra and to stimulate students to think geometrically. Includes reproducible student worksheets. (MKR)