Camila,the earth,and the sun: Constructing an idea as shared intellectual property

Recent research has challenged traditional assumptions that scientific practice and knowledge are essentially individual accomplishments, highlighting instead the social nature of scientific practices, and the co‐construction of scientific knowledge. Similarly, new research paradigms for studying learning go beyond focusing on what is “in the head” of individual students, to study collective practices, distributed cognition, and emergent understandings of groups. These developments require new tools for assessing what it means to learn to “think like a scientist.” Toward this goal, the present case study analyzes the discourse of a 6th‐grade class discussing one student's explanation for seasonal variations in daylight hours. The analysis identifies discourse moves that map to disciplinary practices of the social construction of science knowledge, including (1) beginning an explanation by reviewing the community's shared assumptions; (2) referencing peers' work as warrants for an argument; and (3) building from isolated ideas, attributed to individuals, toward a coherent situation model, attributed to the community. The study then identifies discourse moves through which the proposed explanation was taken up and developed by the group, including (4) using multiple shared representations; (5) leveraging peers' language to clarify ideas; and (6) negotiating language and representations for new, shared explanations. Implications of this case for rethinking instruction, assessment, and classroom research are explored. © 2009 Wiley Periodicals, Inc. J Res Sci Teach 47:619–642, 2010     

Proctored Versus Unproctored Online Exams: Studying the Impact of Exam Environment on Student Performance

Increasing numbers of universities are offering courses in online and hybrid formats. One challenge in online assessment is the maintenance of academic integrity. We present a thorough statistical analysis to uncover differences in student performance when online exams are administered in a proctored environment (i.e., in class) versus an unproctored environment (i.e., offsite). Controlling for student grade point average (GPA), no significant differences in mean overall course performance or exam performance between the two groups were found, nor were there any differences in the mean vectors of individual exam scores. The study reveals that the group taking online exams in the unproctored environment has significantly more variation in their performance results. In examining potential causes of the greater variation, analyses were performed to assess whether an increased level of possible cheating behavior could be observed from performance results for students in the unproctored section. No evidence of cheating behavior was found.     

Does Exposure to Code-Switching Influence Language Performance in Bilingual Children?

This study investigated whether the effect of exposure to code-switching on bilingual children's language performance varied depending on verbal working memory (WM). A large sample of school-aged Spanish–English bilingual children (N = 174, M_age = 7.78) was recruited, and children were administered language measures in English and Spanish. The frequency with which the children were exposed to code-switching was gathered through parent report. For children with high verbal WM, greater exposure to code-switching was associated with higher levels of language ability. In contrast, for children with lower verbal WM, greater exposure to code-switching was associated with lower levels of language ability. These findings indicate that children's cognitive processing capacity dictates whether exposure to code-switching facilitates or hinders language skills.     

Unpacking the Complex Relationship Between Beliefs,Practice, and Change Related to Inquiry-Based Instruction of One Science Teacher

This case study examines the complex relationship between beliefs, practice, and change related to inquiry-based instruction of one science teacher teaching in a high-poverty urban school. This study explores how video-supported collaboration with peers can provide the catalyst for change. Transcribed collaborative dialogue sessions, written self-reflections, and videotapes of lessons were used to identify and isolate the belief systems that were critical to the teacher’s decision making. The Interconnected Model of Professional Growth was then used to trace the trajectories of change of the individual belief systems. Analysis of the data revealed the relationship between beliefs and practices was complex in which initially espoused beliefs were often inconsistent with enacted practice and some beliefs emerged as more salient than others for influencing practice. Furthermore, this research indicates change in both beliefs and practice was an interactive process mediated by collaborative and self-reflection through participation in the video-supported process.