This article describes an experiment with a successful instructional system for the in-service education of junior high school mathematics teachers, to determine the relative contribution of the televised component. (MM)

A set of activities designed to help students discover properties about order-3 spirolaterals on square grid paper is presented. The materials are prepared on worksheets designed for easy duplication. The lessons can lead to investigations involving spirolaterals of many other orders and shapes. (MP)

Three worksheets provide activities which use numerical coding of events in American history, operations on the digits 1, 9, 7, and 6, anddetermination of number patterns. (SD)

An activity is presented which provides an opportunity for students to discover numerical patterns with the aid of a calculator. (MN)

Learning activities designed to help students gain experience in reading three types of maps and in using the results to solve multistep problems about average speed and cost per mile are presented. Worksheets suitable for reproduction are provided. (MP)

Presents an argument for using dot paper rather than geoboards at postelementary levels to study perimeter, area, congruence, similarity, and other geometric ideas. Emphasizes need for students to be active learners. (GW)

Describes one unit on analyzing and writing mystery stories in a problem-solving seminar for seventh graders that incorporates the use of television, cooperative learning, and reading and writing in the mathematics class. Provides a sample activity sheet and examples of seventh-grade mystery stories. (Contains 14 references.) (MDH)