Contends that, despite ongoing criticism, Allen's arc elasticity formula remains entrenched in the microeconomics principles curriculum. Reviews the evolution and continuing scrutiny of the formula. Argues that the use of the geometric mean offers pedagogical advantages over the traditional arithmetic mean approach. (CFR)

Maintains that teachers and textbook graphics follow the same basic pattern in illustrating changes in demand curves when product prices increase. Asserts that the use of computer graphics will enable teachers to be more precise in their graphic presentation of price elasticity. (CFR)

Presented is a concrete, realistic way of representing concepts of coordinate geometry. Students represent the coordinates in a living version of a five-by-five square geoboard. Procedures and examples for using this activity are included. (KR)

The article discusses strategies for parents to help their children improve math skills. It examines graphing skills and looks at three types of graphs (line graph, bar graph, and pie chart). Various simple activities illustrate what all scientists and mathematicians do when conducting experiments or developing mathematical models. (SM)

An approach to teaching electrochemical driving force that helps students comprehend the forces that govern ion flux across biological membranes and sets the stage for more elaborate analysis of biochemical signals is presented. Background information and two sample problems and answers are included. (KR)

Entering a value into a calculator and repeatedly performing a function f(x) on the calculator can lead to the solution of the equation f(x)=x. Explores the outcomes of performing this iterative process on the calculator. Discusses how patterns of the resulting sequences converge, diverge, become cyclic, or display chaotic behavior. (MDH)

The abundance of life, the highly varied geologic formations, and climatic variations found in a wide range of deserts is presented. Misconceptions held about the desert are discussed. A list of resources and activities are included. (KR)

Described is an instructional method that makes use of an electronic spreadsheet for the numerical and graphical introduction of the fundamentals of Taylor polynomials. Included is a demonstration spreadsheet using the expansion polynomial to evaluate the cosine function. (JJK)

Describes a simple demonstration of the flow of sand through an orifice at the bottom of a sandbox. Advocates the experiment's use with dimensional analysis for students in an introductory physics course. (WRM)

This article describes an activity in which students plot collections of ordered pairs according to prescribed set conditions. The coordinate plane sets can have rich variety, and their construction fosters critical thinking, attention to detail, and algebraic reasoning. (Contains 3 figures.)

This article describes three engaging introductions for topics on a Cartesian graph and the distributive property. (Contains 3 figures.)

This paper is concerned with helping elementary and junior high school students interpret and construct graphs. Four types of graphs are emphasized--bar, picture, line, and circle or area. The hypothesis is that students in elementary and intermediate grades are generally insufficiently prepared to use graphs effectively, although they are…

The primary aim of this guide is to aid teachers in planning and preparing a senior high school mathematics course for students preparing for college work. It is divided into separate one-semester courses of seven chapters each. The first-semester course consists of a traditional approach to the introduction of trigonometry and trigonometric…

Presents several kinds of mathematical problems or activities which are suggested by a clock face. (PK)

Describes the use of the Communication Anxiety Graph (CAG) to help students trace the pattern of their anxiety when making a speech. Also reports the results of a study using the CAG. Provides advice for student speakers based on when their anxiety peak may occur. (PD)