The conceptual categories that children have developed in their second year were studied in five experiments using object manipulation tasks. Subjects included 152 children from 18 to 31 months of age. These very young children had formed global conceptions of many domains of objects. (SLD)

Order and entropy exist in all human and environmental processes. Technological innovation begins with entropy, and problem solving creates order. Humans learn by building order through conceptualizing but create entropy by not using a wider range of learning methods. (SK)

Explores dynamic modeling as an opportunity for students to think about the science content they are learning. Concludes that creating dynamic models has great potential for use in classrooms to engage students in analysis, relational reasoning, and synthesis. Contains 21 references. (DDR)

Reviews literature on conceptual change and the study of concepts. Introduces a theory of one particular type of concept. Contains 25 references. (DDR)

Responds to Mandler's critique of authors' view of infant categorization. Maintains that their view of infant categorization is not characterized by a shift from one type of category to another but by gradual changes in the kinds of information infants can use in forming categories. Clarifies position regarding a single categorical process using…

Proposes that children progressively recognize deeper and deeper similarities between their physical angle experiences, and classify them firstly into specific situations, then into more general contexts, and finally into abstract domains. Indicates that the standard angle concept first develops in situations where both arms of the angle are…

Examines how teachers, students, and scientists construct ways of investigating and knowing science. Identifies ways that particular teaching strategies provide opportunities for student engagement. (Author/CCM)

Discusses the concepts delineated in the terms "induction" and "deduction" as presented in some of the scientific literature. The article endeavors to contribute to a greater awareness of terminology identification and of the tangents, plural forms, and crossings between didactic strategies that draw on "induction" or "deduction." (53 references)…

A study investigated effects of variations in the number of instances comprising a category on concept acquisition by 31 children (ages 9-14) with mild intellectual disability and 19 controls. Intellectual disability had little effect on ability to abstract a category prototype but did reduce use of exemplar-specific information for recognition.…

Reports on a study designed to develop and validate a framework for characterizing middle school students' thinking across four processes: describing data, organizing and reducing data, representing data, and analyzing and interpreting data. Results indicate that students progress through four levels of thinking within each statistical process.…

Introduces a special issue on the ways in which symbolic tools enable, mediate, and shape mathematical thinking while being themselves a product of these processes. (Author/MM)

Presents a cultural-developmental framework for the analysis of children's mathematics in collective practices and illustrates the heuristic value of the framework through the analysis of videotaped episodes drawn from a middle-school classroom. Discusses the promise and limitations of the framework as a method for furthering understanding of the…

Analyzes two classroom episodes guided by the assumption that thinking can be conceptualized as an activity of communication and learning can be regarded as modifying and extending one's discursive ways. Aims to uncover the ways in which the discursive uses of such new symbolic tools were interactively constructed by the students. Concludes that…

This paper traces the evolution of a theory of learning in nature in order to explain how people learn in natural settings. The intellectual roots of the theory in informal learning, cognition, affective development, experiential and meaningful learning are described and the synthesis into a comprehensive theory of learning in nature are…

Conceptual change is a popular, contemporary conception of meaningful learning. Conceptual change describes changes in conceptual frameworks (mental models or personal theories) that learners construct to comprehend phenomena. Different theories of conceptual change describe the reorganization of conceptual frameworks that results from different…