Within the historical context of the development of chemistry, Avogadro's hypothesis represents a fundamental concept: It allowed Avogadro to explain Gay-Lussac's law of combining volumes and it allowed Cannizzaro to establish a more accurate set of atomic mass values. If students are going to understand the concept of relative atomic masses and…

Introducing an approach to detailed assessment involving videotaping clinical interviews, the authors highlight strengths of this approach for understanding children's thinking, informing instruction, and furthering professional learning. (Contains 4 figures.)

In this paper we describe learners being asked to generate examples of new mathematical concepts, thus developing and exploring example spaces. First we elaborate the theoretical background for learner generated examples (LGEs) in learning new concepts. The data we then present provides evidence of the possibility of learning new concepts through…

Student-centered tasks, such as having students select vocabulary to be learned, offer one way of supporting both content area learning and independent word learning. The underlying foundation of these tasks is the vocabulary terms and phrases that students personally deem important for understanding what is read. With this in mind, the authors…

In spite of the expectations that exist regarding efforts to develop competence and in spite of the large amounts of resources devoted to it, there is a marked lack of empirically-based research on competence development in companies and other organizations. The purpose of this article is to present a review of research on strategies for…

How do we construct abstract ideas like justice, mathematics, or time-travel? In this paper we investigate whether mental representations that result from physical experience underlie people's more abstract mental representations, using the domains of space and time as a testbed. People often talk about time using spatial language (e.g., a "long"…

The learning cycle has been embraced as a teaching approach that is consistent with the goals of the "National Science Education Standards" (National Research Council, 1996). Science teacher educators may be disappointed to find, however, that preservice teachers may fail to grasp this model, even after extensive instruction (e.g., Settlage,…

The internal/external frame of reference model (I/E model; Marsh, 1986) is a highly influential model of self-concept formation, which predicts that domain-specific abilities have positive effects on academic self-concepts in the corresponding domain and negative effects across domains. Investigations of the I/E model do not typically incorporate…

The purpose of this article is to provide teachers with strategies for improving students' writing and deepening their conceptual understanding through the use of science notebooks. The strategies include using various resources and providing a variety of feedback opportunities for students. A sample science investigation and an accompanying…

We conducted a longitudinal analysis of the relative intensity and duration of interests associated with conceptual domains between the ages of 4 and 6 years, respectively. Results indicated a significant portion of preschool children do sustain an interest in conceptual domains during some portion of their childhood. Expected gender differences…

The primary objective of this project was to analyze the change in use of academic science vocabulary and conceptual understanding of erosion by the ELLs participating in the Math, Science and Language (MSL) camp conducted in 2008. The researcher examined archival data in the form of student journals collected during the MSL camp of 2008. Current…

This study investigated middle school students' conceptual understanding of algebraic equations. Participants in the study--257 sixth- and seventh-grade students--were asked to solve one set of algebraic equations and to generate story problems corresponding with another set of equations. Structural aspects of the equations, including the number…

The purpose of this study was to compare the effects of questioning "during" a read-aloud and questioning "after" a read-aloud, using science-related informational tradebooks with first-and second-graders. Three thematically-related tradebooks were used, each portraying a scientist involved in authentic investigation. Students in two first/second…

This study has examined the impact of teaching certain basic concepts of astronomy through a predict-observe-explain strategy, which includes three-dimensional (3D) computer modeling and observations on conceptual changes seen in sixth-grade elementary school children (aged 11-13; number of students: 131). A pre- and postastronomy instruction…

Teaching science through inquiry-based, student-centered instructional methods has been consistently emphasized by science education reform documents such as the National Research Council's (NRC) "National Science Education Standards" (NSES), and practically all states have adopted inquiry standards. In order for science education…