Gives definitions of taxicab geometry and the MacDraw format for graphing. In the world of taxicab geometry, movement through the plane is along horizontal and vertical paths. Describes specific application to conic sections, including circle, ellipse, parabola, and hyperbola. Lists five references. (YP)

Reports on an investigation of a population of dandelions on a school lawn. Describes the objectives, rationale, study area, and the results of the study. Includes tables and graphs that show data collected. (RT)

Reports on a study of the impact of CD-ROM on online searching at an academic library. Data are presented on online connect time, numbers of online users, and types of users of various services. The effects of library policy and fees are discussed. (MES)

Reviews two software packages: Graphical Analysis III and Lewis Diagrams. Finds Graphical Analysis III to be a fast and versatile graphing program for high school science classes with access to Apple II microcomputers. Lewis Diagrams is designed to aid in determining Lewis structures of molecules and ions for IBM computers. (MVL)

The effectiveness of using the age of references to control the exhaustivity of the reference representation in information retrieval was investigated through analysis of optimal cluster-based retrieval results. The results show that the foreground representation at its optimal level of exhaustivity is restricted to references with ages less than…

Describes the different effects for four types of activities on students' pronunciation of targeted second-language (L2) vocabulary used in oral presentations. Samples of pronunciation were elicited at three points. The observed effects over time are presented graphically, and the complex learning processes underlying these effects are discussed.…

Middle-school students were asked to determine the dimensions of a hotel atrium so that guests could enjoy the maximum area of scenic view, given that 650 feet of brass railing could be used around each floor. Several solution approaches are described. (MKR)

Reports five experiments; the first two assessed the effect of the selectional restriction requirements of verbs and the animacy of nouns on sentence comprehension, the third determined the cause of the interaction found in the first set of studies, and the fourth and fifth were self-paced reading experiments. (52 references) (Author/CK)

Reports on a longitudinal study of the relationship between productive phonological ability and awareness in children under the age of six. The study followed 45 subjects with variant productive phonology levels from the mean age of 3 years, 6 months to 6 years, 0 months. As a child matures in productive phonology, accompanying exponential growth…

Examines the accuracy of the current public attitude that instruction in English as a Second Language (ESL) at the college level is too expensive, and that nonnative students' success is not commensurate with the cost of teaching them. The article argues that these students represent the country's future and that educators must counter the assault…

Describes a study of undergraduates at Aston University (United Kingdom) that investigated whether maps were an appropriate navigational aid for searching in a hypertext environment. Task performance, system use, previous computer experience, perceptions of the system, and cognitive map data are examined; and implications for hypertext system…

Presents a model of the tutoring process that takes into account the evolving tutor/student relationship and the subject matter concerns that the tutor is helping the student master. Reports illustrative data from case studies from which the model is derived. (15 references) (MDH)

Uses air temperature profiles--a topic taught in beginning meteorology courses--to illustrate the ease of restructuring the teaching/learning environment as a problem-solving mode. Students access real-time information through Accu-Weather's interactive database. Students use the data to answer the question, "What happens to air temperatures…

Effects of dimensionality on ability estimation of an adaptive test were examined using generated data in Bayesian computerized adaptive testing (CAT) simulations. Generally, increasing interdimensional difficulty association produced a slight decrease in test length and an increase in accuracy of ability estimation as assessed by root mean square…

This article, which is organized around a single, well-known algorithm for root extraction, presents a way of incorporating dynamical systems into the teaching of mathematics. Included are sample exercises using complex numbers and the computer where students have the opportunity to do some analysis on this algorithm. (KR)