Presents problems appropriate for high school and college students that highlight dilution methods. Promotes an understanding of dilution methods in order to prevent the unnecessary waste of chemicals and glassware in biology laboratories. (JRH)

Presents an activity that highlights the mechanism and power of natural selection. Allows students to think in terms of modeling a biological process and instills an appreciation for a mathematical approach to biological problems. (JRH)

Jinfa Cai's study comparing Chinese and American sixth-grade students' mathematics performance found that American students did better on simple and complex problems than on computation. One reason might be Asian countries' stress on rote learning. Paul George's 1995 monograph "Japanese Schools: A Closer Look" found instruction…

Presents a framework for differentiating between five levels of extension of knowledge: basic features, forms, rules, application, and elaboration. Comparison of the extent of knowledge use exhibited by (n=14) Year-11 Australian students on a range of plane geometry problems found that high-achieving students exhibited greater extension of…

Describes a study in which concept maps drawn by high school students (n=12) were evaluated using quantitative measures. Results indicate that the concept maps are useful in assessing the understanding of relationships between the concepts required for multiple step problem solving in physics. Contains 12 references. (DDR)

Argues that deficiencies in critical reading and thinking skills contribute to errors in problem solving and erroneous conclusions. Describes an activity that is designed to allow students to discover their own errors during an in-class analysis. (DDR)

Economic reasoning skills integrate easily with the business education curriculum and enhance students' development of decision-making and problem-solving techniques. One method involves having students apply deductive reasoning to economic mysteries. (JOW)

Sixteen middle school students ranked the lengths of various paths in problem-solving interviews. Every student invoked at least one of four intuitions that originated from their everyday experiences: compression, detour, complexity, and straightness. Students continued to use their inadequate intuitions in the posttest before applying learned…

This article addresses issues in model building and statistical inference in the context of student modeling. The use of probability-based reasoning to explicate hypothesized and empirical relationships and to structure inference in the context of proportional reasoning tasks is discussed. Ideas are illustrated with an example concerning…

Three experiments examined the role of representations in adolescents' deductive reasoning. Findings indicated that, with age, conditional reasoning improved on tasks containing permission conditional relations; reasoning fallacies increased on tasks containing causal conditional relations. Valid conditional inferences were more common on problems…

Suggests that a practical model for dialogue and decisionmaking in ethics needs to be developed, which is intended for widespread use within organizations and communities. Outlines objectives of an effective model, and basic questions that it must respond to. Discusses piloting the model, as well as facilitation of dialogue, development of…

Discusses how design projects can best be encountered through a designer approach that is inclusive of theoretical and practical knowledge as well as the capacity for pragmatic action. Highlights include design cultures and cultures of design; foundations of design; fundamental activities supported upon the foundations of design; and design…

Assesses the ability of university students enrolled in an introductory calculus course to solve related-rates problems set in geometric contexts. Indicates that overall performance on the geometric related-rates problems was poor and the poorest performance was on steps linked to conceptual understanding. (Contains 34 references.) (Author/ASK)

Reports on the approaches of two classroom science teachers, supported by a research group, to understanding the consequences of a classroom change implemented in response to a perceived problem. Focuses on the consequences of using problem solving tasks for all students. (Author/YDS)

Studied differences in cognitive processes related to creativity and intelligence using EEG coherence and power measures in the lower and upper alpha bands. Results of 2 experiments involving 49 and 48 right-handed student teachers suggest that creativity and intelligence are different abilities that also differ in the neurological activity…