Discussed are the idea, examples, problems, and applications of convexity. Topics include historical examples, definitions, the John-Loewner ellipsoid, convex functions, polytopes, the algebraic operation of duality and addition, and topology of convex bodies. (KR)

Describes activities for developing mathematical and science process skills using the labels on food packages. Provides objectives, rationale, lesson outlines, procedures, worksheets, evaluation, teacher notes, extensions, and student worksheets for the activities. (YP)

Describes the use of calculators for the teaching of mathematics in grade 1. (YP)

Describes activities emphasizing the process of measuring. Presents three activities on length, area, and angles with questions and illustrations. (YP)

Describes activities focusing on reading, recording, and analyzing schedules. Provides objectives, directions, worksheets, extensions, and answers to each of the activities. (YP)

Discusses four examples of beliefs held by secondary school mathematics students. Suggests implications for classroom teaching. Eight references are listed. (YP)

Investigates the development of understanding of multiplication from the early school years through to the top primary age group. Identifies the children's difficulties and analyzes their solution strategies. Reports that progressive abstraction is related to the children's developing understanding of number and to their procedures for addition.…

Problem solving by example is an intermediate step toward mastering problem-solving heuristics. Discussed are problem-solving processes by using two problem examples. Emphasized are heuristics cataloging in a problem-solving log, and approaches to solutions, not the solutions themselves. (YP)

Discusses the use or misuse of statistics or probability in society. Presented are examples from opinion polling, sports, the 1970 draft lottery, and the law. Lists 18 references. (YP)

Presents an activity for upper elementary students called "Soil Structure and Ground Water." Provides procedures, materials, key concepts, background, and extensions. (YP)

Identifies four causes of confusion in reading mathematics related to numbers, symbols and sentences, vocabulary, and directionality. Discusses techniques for overcoming each type of the confusion. (YP)

Discusses how to help children acquire mathematical concepts and teach for precise mathematical concepts. Describes four activities to reinforce the concepts introduced. (YP)

Discusses how various children's books can be used to introduce and explain geometric topics through a problem-solving approach. Selected are five books with words and five books without words. (YP)

Discusses activities using base-10-block skits to teach number system concepts in first grade classrooms. Describes the students' responses to the activities. (YP)

Illustrates an activity used in the classroom to reteach previously learned concepts, to review a unit, to introduce a vocabulary, to practice estimation, or to improve number sense. Provides three sets of game cards and explains how to use them. (YP)