Six activities useful in developing the idea of prime factorization are described. Some of these activities are best done with a calculator. (MK)

This article seeks to examine some basic concepts of "telling time" and to suggest a more effective way of teaching such a fundamental concept. (Author/MK)

Five intuitive explanations of division by zero that arise from the common models used in the elementary school to introduce whole number division are presented. (MK)

Some history, applications, and unique characteristics of zero are discussed. (MK)

Masters of worksheets designed to generate interest in mathematics and provide mathematical experiences that lead to the introduction of the concept of a variable are presented. (MK)

Written for teachers of "liberal arts physics," this article about logarithms outlines a way to review arithmetic skills in manipulating powers, discusses the attitude of physicists toward numbers, and gives an introduction to estimation. (MK)

Research done with ten year olds on problem solving, generalization, and proof is outlined. (MK)

Discusses the question of whether mathematics is discovered or invented. An approach known as constructive mathematics and based on the belief that mathematics can have real meaning if its concepts can be constructed by the human mind is presented. (HM)

A week-by-week readiness program for preschool and early primary children. (Editor)

Tests the hypothesis that when a "control for size" is introduced, preference for rectangles near the golden section reemerges. Also focuses on the "measure of preference". (Author/RK)

Presents the dice game "Drop Dead" as an example of an absorbing Markov chain. Determines the expected length and expected score of a turn of the game. (ASK)

Discusses some aspects of the defining process in geometrical context in the reference frame of the theory of "figural concepts." Presents analysis of some examples taken from a teaching experiment at the sixth-grade level. Contains 30 references. (Author/ASK)

Discusses the results of research which examines the perceptions of teachers as they initially engage in instruction using graphing calculators. Data were collected from 261 math and science teachers of grades 6-12. Participant views changed significantly overall in favor of viewing the graphing calculator as a thinking tool to enhance conceptual…

Highlights the argument that states that problem solving is much more than just solving problems, by focusing on problem-solving history, George Polya's view of problem solving, Asians' successful use of multiple intuitive solutions, and other examples. (ASK)

Examines various processes of verbalizing in mathematics teaching. Describes several types of communication between school students and gives some examples for tasks. Interpretations for didactical concepts based on ideas about mathematical modeling, heuristic-experimental working, and also work with sequences of questions in mathematics teaching…