Presents an activity that focuses on fractions. Students engage in number sense and operations, logical reasoning, writing, and real-world applications of fraction concepts. (Author/NB)

Describes how students develop proportional reasoning through problem solving. Identifies the essential components of proportional reasoning and includes recommendations for instruction. (YDS)

Describes an Internet-based project to familiarize students with online investment analysis and stock portfolio management. Outlines a process for writing learning outcomes that address three levels of cognition: knowledge/comprehension, application/analysis, and synthesis/evaluation. (SK)

Investigates secondary school students' concepts of isotopes and allotropes and how the concepts are linked to the Periodic Table of Elements (PTE). Questions senior high school students with multiple choice items and interviews. Shows that students actively tried to make sense of what they had experienced. (KHR)

Defines 'thenwhat' as the moment when strategy that is supposed to be about mathematical thinking has no clear path forward as a result. Discusses how strategies designed to stimulate mathematical learning and thinking go nowhere if teachers do not think about where to go next or how to use what happens as a result of the strategy. (KHR)

Describes "World Class Tests in Mathematics and Problem-Solving," developed with the belief that creativity is worth nurturing and can be nurtured. (KHR)

Investigates the effect of gender and reasoning ability on the human circulatory system concepts achievement and attitude toward biology. Reports a statistically significant mean difference between concrete and formal students with regard to achievement and attitude toward biology. (Contains 24 references.) (Author/YDS)

Introduces two trade books that can be used as an instructional tool to promote scientific thinking and science process skills among children. (YDS)

Proposes a model which connects the acts of reading and writing in three cyclical components: the forming cycle, the coding cycle, and the reviewing cycle. Explains in each interlock of the cycles are the subprocesses generating, organizing, and editing. Notes that the sensor is centered where all three prime processes overlap, serving to…

Compares and analyzes three different measures of creativity in (n=135) gifted and (n=161) normal students to understand the nature of creativity and propose guidelines for measuring creativity. Uses Torrance Test of Creativity Thinking (TTCT), Test of Creative Problem Solving and Finding in Science (CPFS), and Creative Behavior Checklist in…

Presents an example from probability and statistics that ties together several topics including the mean and variance of a discrete random variable, the binomial distribution and its particular mean and variance, the sum of independent random variables, the mean and variance of the sum, and the central limit theorem. Uses Excel to illustrate these…

Appraises a number of approaches to 'thinking globally' in environmental education with particular reference to popular assumptions about the universal applicability of Western science. Suggests that the contribution of Western science to understanding and resolving environmental problems might be enhanced by seeing it as one among many local…

Integrates concept mapping into the chemistry laboratory and requires students to construct a concept map for each experiment. Reports a decrease in student questions concerning set up and procedure. Recommends using computer software such as Chem Sketch 5.0 which is free and available from the Internet. (Contains 15 references.) (YDS)

Describes theoretical points concerning the idea of semiotic means of objectification. Analyzes classroom activity by observing the interface between the spoken and the seen. Discusses the role of a category of linguistic terms related to actions of showing or pointing out something that constitute a key element in the mathematical discursive…

Investigates what the role of arguments from physics within mathematical proof is, and how this role should be reflected in the classroom. Presents examples showing the fruitfulness of center of gravity arguments in terms of geometrical configuration and the laws of the lever. Discusses educational advantages of the use of arguments from physics…