Student's interaction with computer representations: Analysis of discourse in laboratory groups

Language use in student laboratory groups makes apparent students' conceptions in science, their interpretation of the activity or task, and the negotiation of the roles of the members. This article reports on a methodological approach to analyze student discourse systematically. Four Grade 12 lab groups working on microcomputer-based laboratories (MBL) are the focus of the study. The MBL experiences were used to help students link oscillatory motion to graphical representations. Study of student discourse reveals the role the computer plays in the group context and the ways that this context is shaped by the computer. Developing a better understanding of the role of the computer in student conversations suggests ways to fruitfully construct contexts for learning physics. © 1996 John Wiley & Sons, Inc.     

Spanish-Speaking Children's Social and Language Development in Pre-Kindergarten Classrooms

The current study examined the social and language development of 345 Spanish-speaking pre-kindergartners who attended pre-kindergarten programs that varied widely in how much Spanish was spoken in the classroom by the teacher. Previous studies on English language learners have focused on how the language of instruction impacts children's language proficiency, ignoring the context in which children are learning. The current study found better social skills and closer teacher—child relationships in classrooms where teachers spoke some Spanish. Teacher ratings of children's peer social skills and assertiveness were positively associated with increased amounts of Spanish being spoken. More Spanish language use in the classroom was also related to a decrease in children's likelihood of being victims of aggression as rated by independent observers. The findings have implications for better understanding how policy decisions regarding language of instruction impact children in the social domain. As early education programs are faced with the challenging task of developing best practices for English language learners, it is essential that programs are attentive to the social implications of language.     

Sexuality education: how children of lesbian mothers ‘learn’ about sex/uality

Sexuality is something that children experience from an early age. It may be a cause of individual concern and anxiety, but is seldom, if ever, deconstructed at any stage of a child's education. Institutionalized fear and misunderstandings of Section 28 (1988) have effectively removed discussion of sexuality, homosexual or otherwise, from the English school curriculum. This structural silence on sexuality is all too frequently repeated at home. In this article I interrogate how children from lesbian parent households ‘learn’ about sexuality, looking at the effects of their parents' (homo)sexual orientation on their ‘sexuality education’. I consider how sex education is taught in schools; what children traditionally ‘learn’ about sexuality. I then look at whether sexuality education is any different for children from lesbian parent families; whether these children have greater sexuality knowledge, and, if so, how this has been ‘learnt’. I suggest that it may be the ambient presence of sexuality—as both a topic of conversation and mothers' unspoken sexual identity—that means lesbian parent families offer a distinctive form of sexuality education. This article draws on empirical research on sexuality and lesbian parent families with lesbian parent families who lived in the Yorkshire region, UK.     

Scaffolding Preservice Science Teachers' Evidence-Based Arguments During an Investigation of Natural Selection

In this qualitative case study, preservice science teachers (PSTs) enrolled in their advanced methods course participated in a complex, data-rich investigation based on an adapted version of the Struggle for Survival curriculum. Fundamental to the investigation was the use of the Galapagos Finches software and an emphasis on giving priority to evidence and constructing evidence-based arguments. The questions that guided the research were: (1) What is the nature of the scientific arguments developed by PSTs? (2) How do PSTs go about constructing scientific arguments (emphasis on processes and strategies)? (3) In what ways do the scaffolds embedded in the Galapagos Finches software influence the development of PSTs arguments? Two pairs of PSTs were selected for in-depth examination. The primary sources of data were the electronic artifacts generated in the Galapagos Finches software environment and the videotaped interactions of both pairs as they investigated the data set, constructed and revised their arguments, engaged in peer review sessions, and presented their arguments to the class at the end of the unit. Four major patterns emerged through analysis of the data. First, using the software, PSTs consistently constructed claims that were linked to evidence from the investigation. Second, although PSTs consistently grounded their arguments in evidence, they still exhibited a number of limitations reported in the literature. Third, the software served as a powerful vehicle for revealing PSTs knowledge of evolution and natural selection. Finally, the PSTs approach to the task had a strong influence on the way they used the software.     

Just do it? impact of a science apprenticeship program on high school students' understandings of the nature of science and scientific inquiry

The purpose of this study was to explicate the impact of an 8‐week science apprenticeship program on a group of high‐ability secondary students' understandings of the nature of science and scientific inquiry. Ten volunteers (Grades 10–11) completed a modified version of the Views of Nature of Science, Form B both before and after their apprenticeship to assess their conceptions of key aspects of the nature of science and scientific inquiry. Semistructured exit interviews provided an opportunity for students to describe the nature of their apprenticeship experiences and elaborate on their written questionnaire responses. Semistructured exit interviews were also conducted with the scientists who served as mentors for each of the science apprentices. For the most part, students held conceptions about the nature of science and scientific inquiry that were inconsistent with those described in current reforms. Participating science mentors held strong convictions that their apprentices had learned much about the scientific enterprise in the course of doing the science in their apprenticeship. Although most students did appear to gain knowledge about the processes of scientific inquiry, their conceptions about key aspects of the nature of science remained virtually unchanged. Epistemic demand and reflection appeared to be crucial components in the single case where a participant experienced substantial gains in her understandings of the nature of science and inquiry. © 2003 Wiley Periodicals, Inc. J Res Sci Teach 40: 487–509, 2003     

Confronting prospective teachers' ideas of evolution and scientific inquiry using technology and inquiry‐based tasks

This study addresses the need for research in three areas: (1) teachers' understandings of scientific inquiry; (2) conceptual understandings of evolutionary processes; and (3) technology‐enhanced instruction using an inquiry approach. The purpose of this study was to determine in what ways The Galapagos Finches software–based materials created a context for learning and teaching about the nature of scientific knowledge and evolutionary concepts. The research used a design experiment in which researchers significantly modified a secondary science methods course. The multiple data sources included: audiotaped conversations of two focus pairs of participants as they interacted with the software; written pre‐ and posttests on concepts of natural selection of the 21 prospective teachers; written pre‐ and posttests on views of the nature of science; three e‐mail journal questions; and videotaped class discussions. Findings indicate that prospective teachers initially demonstrated alternative understandings of evolutionary concepts; there were uninformed understandings of the nature of scientific inquiry; there was little correlation between understandings and disciplines; and even the prospective teachers with research experience failed to understand the diverse methods used by scientists. Following the module there was evidence of enhanced understandings through metacognition, and the potential for interactive software to provide promising context for enhancing content understandings. © 2005 Wiley Periodicals, Inc.