Explores a quality control investigation with baseballs. Students were placed in groups of three to handle specific jobs: data recorder, measurement-instrument handler, and instrument reader. Includes assessment instruments and a list of suggested investigations. (MKR)

Describes an experiment in network collaboration using the Geometer's Sketchpad to allow students in a computer laboratory to view one another's work. (MKR)

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)

Described is a strategy that allows students to experiment with probability without applying formulas to solve problems. Students are able to intuitively develop concepts of probability before formal definitions and properties. Sample problems are included along with BASIC programs for some of the problems. (KR)

An example of real-world data is used to introduce comprehensible and visual images of the data and their attributes and relationships. Stem-and-leaf plots, box-and-whisker plots, and scattergrams are used to encourage prompt recognition of data characteristics and to effect appropriate interpretations and inferences. (JJK)

Provided are tips on note taking for students. Suggestions for changing instruction designed to aid students in their note taking are discussed. (CW)

Presented is an activity which examines an arithmetic concept from a geometric point of view. Objectives, prerequisite learning, and procedures are discussed. Four worksheets are provided with answers. (CW)

Described is how the construction of a breathalyzer was used by high school students to focus on a variety of concepts and principles of science and mathematics. The procedure for constructing the breathalyzer, related material, and summary are included. (KR)

Mathematical enrichment involving writing and drawing activities are proposed as powerful instructional tools. Examples for the secondary mathematics classroom included here utilize poetry writing, daffynitions, sketching numerical witticisms, creating rebus and jumble puzzles, and drawing cartoons with fraction captions. (JJK)

The sign-chart method is often used to solve polynomial inequalities involving products or quotients. Presented are examples that extend this method to solve higher-degree polynomial, radical, exponential, logarithmic, absolute-value, and trigonometric inequalities and whose graphic representations lead to intuitive discussions of continuity. (MDH)

A personal experience is described concerning problem solving that incorporates the computer to help generate multiple examples of proposed conjectures as solutions. The positive potential of technology to allow students of mathematics to experience the process of discovering mathematics through conjecture and generalization is emphasized. (MDH)

Described are the difficulties in translating word sentences between English and Algebra. Two classic sentences that typically produce student errors are presented with explanations that can be shared with the students on overcoming these translation difficulties. (MDH)

The hand-held graphing calculator allows high school mathematics students to graph complex equations that would otherwise take hours of tedious work. This article presents high school mathematics teachers' opinions on its use in lower and upper level math courses. (SM)

Presented is the problem of determining alternative schedules for major league baseball. Equations of the schedule, conditions on the solutions, and solutions are discussed. (CW)

Presented is a method which may be used to help students start their own original investigations and create their own conjectures about fundamental mathematics concepts. An example of this method is provided. (CW)