Relates one secondary geometry teacher's experiences learning and using the computer program "Geometer's Sketchpad." The article describes the program and provides examples of ways this teacher uses it in combination with more traditional teaching tools. (SM)

Reviews research literature leading to design of a new LOGO environment, Geo-LOGO, tailored for elementary students' learning of geometry. Presents empirical data from the first field test of the Geo-LOGO environment, which generally support the efficacy of the software design. (Author/MKR)

Describes two types of star charts commonly available for astronomical viewing and outlines a strategy by which teachers can have students use a computer spreadsheet to prepare their own easy-to-use star charts appropriate for the location, date, and time of viewing. (Author/MKR)

Presents activities using three-dimensional geometry to develop spatial skills. Includes reproducible student worksheets. (MKR)

Describes the use of infometry, or informational geometry, to meet the challenges of information service businesses. Highlights include theoretical models for cognitive coordination and genetic programming; electronic information packaging; marketing electronic information products, including cost-benefit analyses; and recapitalization, including…

Discusses the use of activities demonstrating connections between algebra and geometry, which helps students gain a conceptual understanding of important calculus ideas and gives a historical appreciation of how mathematics evolves. Uses distance, speed, and time problems as an example. (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)

Discusses how students construct mental images that aid estimation skills in the measurement of angles. Reports research identifying four strategies that students use to estimate sizes of angles. Strategies include utilization of the mental images of (1) a protractor; (2) a right angle; (3) a half-turn; and (4) angles of a polygon. (MDH)

Presents a model of rational number using pairs of line segments which can embody ratios of numbers. Actions upon these segments can embody arithmetical operations. Discusses tasks in a computer environment for bringing out diverse algebraic and geometric meanings of rational numbers. (Contains 23 references.) (MKR/Author)

Describes geometry-related activities that explore tessellation patterns and use origami and paper to create three-dimensional figures and pop-up cards. (MKR)

Presented is an activity in which students make models of viruses, which allows them to visualize the shape of these microorganisms. Included are some background on viruses, the biology and geometry of viruses, directions for building viruses, a comparison of cells and viruses, and questions for students. (KR)

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)

It is worthwhile to develop the concepts and conventions that emerge from the child's culture in the teaching of elementary school mathematics, specifically geometry. The discussion is based on experiences with 7- to 12-year-old Navajo children in studies toward the development of a culturally relevant mathematics curriculum. (SLD)

Subjects forced to process redundant material or split their attention between multiple sources of information may encounter extraneous cognitive load. Results of 4 experiments involving 125 fourth graders in Sydney (Australia) provide evidence for the inadequacy of conventionally formatted instructional materials and emphasize debilitating…

Describes the method that Archimedes utilized to calculate the volumes of spheres and other solids. The method found the volume of a sphere by comparing the mass of parallel slices of a sphere and a cone with that of a cylinder of known mass. (MDH)