Describes a unitized data system for a scientific database that stores descriptions of individual experimental steps as separate text-based subunits together with appropriate linking signals. Conversion of graphics into searchable text, use of natural language, and cost effectiveness are discussed. An example using a biology research paper is…

Elementary teachers can use graphing to introduce students to one another. An eye color graphing activity helps students learn more about each other while experimenting with different ways of organizing and displaying information. For follow up, students can apply their graphing knowledge by collecting and displaying data from their families. (SM)

Examines the neglect of library support staff within the context of six areas of library management: physical facilities; effective and efficient work stations; supplies; attitude toward human resources; communication and information; and performance evaluation and feedback. Graphs present data on expenditures in several areas, and suggestions for…

A quantitative application of magnetic braking performed with an air track is described. The experimental measurement of the position of the glider as a function of time is calculated. (KR)

Recommends that economics instruction begin a synthesizing process early by connecting discussion of the production possibilities curve and the supply curve. Suggests that linking the two is logical for conveying integrated economic thinking to beginning students. Argues that such a link makes it easier to discuss the competitive norm. (DK)

Presents a diagram for figuring the value of time into an individual's labor-supply decisions and the time intensiveness of the individual's consumption patterns. Seeks to make the integration of differing time values with leisure income choices more understandable for students. (DK)

A student project that investigated the relationship between resting heart beat frequency and body mass of adult dogs is described. The results are compared to those of other mammals and birds. The procedure and results are included. (KR)

Extensions of unidimensional appropriateness indices are developed for multiunidimensional tests (multidimensional tests composed of unidimensional subtests). Simulated and real data (scores of 2,978 students on the Armed Services Vocational Aptitude Battery) were used to evaluate the indices' effectiveness in determining individuals who are…

Presented are activities concerning the method of graphing the equation y=kx in the Cartesian and other coordinate systems. Students progress from the graph of a straight line to the investigation of conceptually related geometric loci in non-Cartesian coordinate systems. (MDH)

The issue of division by zero is discussed. Activities that cover the topics of measurement division, partition division, relationship to fractions, confusion with dividing into zero, dividing zero by zero, and relation to more formal numbers are presented. (KR)

A graphic procedure is presented for studying differential item functioning (DIF) that is designed to provide diagnostic information for psychometricians and educators. The procedure provides a signature of each test item that can be used with a summary statistic to flag items with DIF. Advantages and limitations are noted. (SLD)

This article (1) provides a review of "Anno's Counting House," a wordless picture-story and game that engages children in thinking about numbers; and (2) examines a classroom activity from which children learn that the same data, graphed differently, may support a variety of conclusions. (GLR)

Identifies two steps to teaching economics, contending that economics learning can be helped with the use of graphs. Divides graphs into two types, concrete and abstract, and compares the two. Presents an exercise on teaching supply and demand utilizing abstract graphs. Plots supply and demand variables and interprets data. (RW)

A metrics and mapping framework is proposed to account for how heuristics, domain-specific reasoning, and intuitive statistical induction processes are integrated to generate estimates. Results of 4 experiments involving 188 undergraduates illustrate framework usefulness and suggest when people use heuristics and when they emphasize…

Aggregate data on grade-retention rates for grades 1 through 12 from 12 American states for 1979-80 and 11 for 1985-86 were examined for across-grade patterns. A negative growth exponential model appears to capture a basic underlying pattern of grade retention rates. (SLD)