The special issue contains 17 articles on life-space interviewing with emotional disturbed and normal children and adolescents, a technique developed by Fritz Redl which is based on psychodynamic theory and uses a problem-solving method of learning within the pupil's natural environment. (DB)

Considered is the open-ended question of the various means of marking an n-inch ruler so that the distance of any integral number of inches from 1 to n can be ascertained with a single measurement. The relationship between a sparsely marked ruler, which is one gracefully marked with the fewest number of marks, and specific discrete graphs is…

A collection of essays focuses on the need to integrate philosophy into sport and physical education. The function of sport philosophy is to examine beliefs and values as a basis for human behavior. Philosophical issues examined include: (1) cheating; (2) competition; (3) the development of self-reflection and responsibility; and (4) the…

Clapping music for two performers provides the basis for a series of mathematical problems in combinatorics and group theory. A discussion provides insight about how to avoid overlooking global extrema in constrained max-min problems when solving systems of algebraic equations. (JJK)

A series of four activities are presented to enhance students' abilities to appreciate and use trigonometry as a tool in problem solving. Activities cover problems applying the law of sines, the law of cosines, and matching equivalent trigonometric expressions. A teacher's guide, worksheets, and answers are provided. (MDH)

Following a brief historical review of the mechanism of mathematical modeling, examples are included that associate a mathematical model with given data (changes in sea level) and that model a real-life situation (process of parallel parking). Also provided is the rationale for the curricular implementation of mathematical modeling. (JJK)

Presented are student activities that involve two standard problems from geometry and calculus--the volume of a box and the bank shot on a pool table. Problem solving is emphasized as a method of inquiry and application with descriptions of the results using graphical, numerical, and physical models. (JJK)

Current thinking of researchers from different disciplines about interaction among students in educational settings and the potential of peer interaction for learning and cognitive development is discussed. Topics of the eight papers presented include: potential outcomes of peer interaction, its nature, peer learning settings, and factors shaping…