Student understanding of biological representations has not been well studied. Yet, we know that to be efficient problem solvers in evolutionary biology and systematics, college students must develop expertise in thinking with a particular type of representation, phylogenetic trees. The purpose of this study was to understand how undergraduates…

Presents an alternative perspective that conceives of graphing as observable practices employed to achieve specific goals rather than as knowledge represented in students' minds. Highlights the nature of graphs as semiotic objects, rhetorical devices, and conscription devices. Illustrates the plausibility and fruitfulness of the new perspective in…

Argues for an approach to conceptual-change instruction that places students' science conceptions and their ability to reflect on those conceptions at the center of science instruction. Focuses on the effect of using status concepts. Contains 24 references. (DDR)

Presents a summary of teaching practices that are successful in promoting conceptual change based on a study of Grades 4, 8, and 10 and on the research literature. Proposes improvements in teaching methodology. Contains 31 references. (DDR)

Examines the types of requests for information made by university students (N=60) as they evaluate scientific news briefs. Student requests most often focus on how research is conducted and why results might occur. Contains 47 references. (DDR)

Draws from studies in the sociology of scientific knowledge to create a new perspective for understanding school science. Merges ethnography and discourse analysis to study science-in-the-making in a physics classroom. Investigates local conceptual ecologies. Contains 55 references. (DDR)

Describes a study in which teaching and learning activities are designed using a cognitive conflict strategy. Focuses on the effectiveness of these activities in classroom research in pre-university courses in Botswana and South Africa. Contains 39 references. (DDR)

Argues that scientific knowledge in school is a social construct in which curriculum proposals are simply points of departure that are transformed by the social interaction that takes place within the classroom. Considers discourse as playing an important role in knowledge construction. Contains 31 references. (DDR)

Examines the impact of one unit of a curriculum module for sixth grade from the Model-based Analysis and Reasoning in Science (MARS) project. Provides an overview of this unit on mass and discusses three aspects of the evaluation of the unit. Contains 22 references. (DDR)

Examines student perceptions of the changing nature of a classroom as a result of the implementation of constructivist approaches. Results indicate that students are appreciative of the opportunity to use their own ideas and knowledge. Contains 31 references. (DDR)

Research has established that students enter their science classes with ideas about the natural world that do not align with accepted scientific beliefs. The diagnosis of these student preconceptions may be seen as an initial, crucial step in the process of teacher-facilitated conceptual change. So as to capture what science teachers do in their…

Describes how Mexican-American language-minority students construct biology concept meanings based on extant linguistic skills. Provides an instructional activity that engages students in constructing meanings through mediational means. Contains 35 references. (DDR)

Illustrates the construction of conceptual models on pressure and flotation using high school students' previous ideas on these concepts. Identifies three models and uses them to analyze students' ideas about physical phenomena and to recognize the inferential structure they use. Contains 28 references. (DDR)

Describes a study that examined changes in the structural complexity of knowledge held by two groups of introductory college-level biology students (N=68, N=93). The subjects constructed concept maps at four-week intervals throughout the instructional term. Contains 49 references. (DDR)

Explores the interaction between scientific epistemological beliefs and learning orientations in a group of Taiwanese eighth-grade students. Suggests the importance of employing a constructivist philosophy in the classroom. Contains 55 references. (DDR)