Secondary science students’ beliefs about class discussions: a case study comparing and contrasting academic tracks

The dialogue that occurs in science classrooms has been the subject of research for many decades. Most studies have focused on the actual discourse that occurs and the role of the teacher in guiding the discourse. This case study explored the neglected perspective of secondary science students and their beliefs about their role in class discussions. The study participants (N?=?45) were students in one of the three differentially tracked chemistry classes taught by the same teacher. Findings about the differences that exist among students from different academic tracks are reported. While it seems that epistemological beliefs focusing on content are common for the students in this study, the students' social framing in the different tracks is important to consider when teachers attempt to transition to more dialogic forms of discourse. Some key findings of this study are (a) students’ beliefs that science is a body of facts to be learned influenced the factors they deemed important for whole-class discussion, (b) students from the lower-level track who typically were associated with lower socioeconomic status were more likely to view their role as passive, and (c) students’ comfort level with the members of the class seemed to influence their decisions to participate in class discussions.     

对国内学习困难研究中存在的几个问题的探讨及研究设想

针对国内学习困难研究中存在的研究对象、学习困难的本质特征与现象描述之间的关系、学校在学生学习困难的形成和发展中的作用以及关于学习困难的个案研究与一般性研究等问题进行探讨。基于此，提出如下研究设想．1、有区别性地筛选学习困难的研究对象；2、把学枝及教师因素纳入对学习困难的生态性研究取向之中；3、重视个案研究；4、从发展的、整体的视角，建立适合我国国情的学习困难分类体系，整合学习困难理论。     

Prospective teachers’ teaching experience: teacher learning through the use of video

Background: Future teachers need to observe, interpret and analyse teaching during the initial teacher education period. The use of videoed teaching and learning in teacher education promotes reflection, and analysing videos of teaching is helpful in learning effective classroom practices that prospective teachers mostly do not have the chance to observe during fieldwork experiences. The analysis of videos of teaching can be seen as a way to enhance the development of prospective teachers’ professional vision, which, in turn, improves instruction. Purpose: The purpose of this study was to examine prospective teachers’ reflections on video examples depicting their own teaching experiences. It aimed to create a professional development environment to facilitate the prospective teachers’ reflection on their own videos and those of their peers to improve their professional vision. Sample: This study was conducted with over 200 (in 31 groups) third-year prospective mathematics teachers in a university in Western Turkey. The student teachers, receiving training to teach first- to fourth-grade elementary school pupils, were taking a teaching methods course. Design and methods: In the first week of the semester, the student teachers, working in groups, were assigned mathematics topics to teach the elementary school pupils. During the semester, each group prepared by trying out their activities in front of other student teachers in other groups. At the end of the semester, one student teacher from each group presented a short lesson related to their mathematical topic to the elementary school pupils. This lesson was videotaped, then later it was watched and discussed by the student teachers. Of the student teachers who undertook the teaching in the videos, 22 volunteers agreed to be interviewed. All groups of student teachers provided written reflections on their experience. Selected videos of the class discussions about the videos of teaching were also used for triangulation. The data were analysed to identify the issues the prospective teachers reflected upon. A content analysis technique was employed. Results: The data indicated that the prospective teachers were able to reflect on several issues related to effective teaching, connect their theoretical knowledge to their practice and consider issues related to pupil learning and difficulties. Conclusion: The findings suggested that the use of video, together with discussions between the student teachers, had the potential to create promising learning opportunities for prospective teachers.     

Enhancement of Quality in Chemical Inquiry by Pre-University Students

Our pre-university chemistry students face problems achieving sufficient quality in chemical inquiry. To try to enhance the quality of student performance in chemical inquiry, Dutch pre-university chemistry students (age 17) carried out an authentic research project on Diffusion of ions in distilled water. The learning materials for this student inquiry project, the teaching scenario and the website were designed in cooperation with five chemistry teachers. Three teachers from this network and two other teachers also implemented the project with 80 students to find out whether the emphasis on relevant concepts of evidence (CoE) improves the quality of student inquiry outcomes. This part – with its emphasis on the CoE – in the student inquiry task is based on four key features: the students feel motivated to explore, focus their attention on, give meaning to and reflect upon CoE. In teams students conducted a guide experiment, analysed a scientific article, did an inquiry and wrote a report, discussed CoE with peers on the Internet and rewrote their reports. All lessons were observed, field notes were made and analysed on whether the intended student activities had been realised. The Internet discussion was recorded in a database and analysed. The first and final reports of all teams were coded and analysed. Also the students appreciation of the activities was assessed. The teaching and learning activities were realized to a very large extent as planned in the design. The emphasis on CoE resulted in 65% of the students achieving a sufficient level of quality in their final reports.     

Interthinking: Young Children Using Language to Think Collectively During Interactive Read-alouds

Mercer, N. (1995) coined the term interthinking to link the cognitive and social functions of group talk. Essentially, interthinking means using talk to think collectively, to engage with others’ ideas through oral language. In this article I share four excerpts from small group interactive read-aloud sessions that were conducted with Grade 1 children, and examine the nature of the interthinking that occurred during these discussions of picture books with Radical Change characteristics (Dresang, E. 1999). I examine the types of discourse that occurred during these read-aloud sessions and some of the techniques I used to guide the children in their construction of knowledge of these contemporary picture books.     

Individual to collaborative: guided group work and the role of teachers in junior secondary science classrooms

This paper, through discussion of a teaching intervention at two secondary schools in Hong Kong, demonstrates the learning advancement brought about by group work and dissects the facilitating role of teachers in collaborative discussions. One-hundred and fifty-two Secondary Two (Grade 8) students were divided into three pedagogical groups, namely ‘whole-class teaching’, ‘self-directed group work’ and ‘teacher-supported group work’ groups, and engaged in peer-review, team debate, group presentation and reflection tasks related to a junior secondary science topic (i.e. current electricity). Pre- and post-tests were performed to evaluate students’ scientific conceptions, alongside collected written responses and audio-recorded discussions. The results indicate that students achieved greater cognitive growth when they engaged in cooperative learning activities, the interactive and multi-sided argumentative nature of which is considered to apply particularly well to science education and Vygotsky’s zone of proximal development framework. Group work learning is also found to be most effective when teachers play a role in navigating students during the joint construction of conceptual knowledge.     

What Makes a Student Group Successful? Student-Student and Student-Teacher Interaction in a Problem-Based Learning Environment

This study investigated student-student and teacher-student interaction in a problem-based course and looked at study success in relation to group dynamics and approaches to studying. Data for this study were provided by 31 law students who were enrolled in a course in legal history at the University of Helsinki in February 2001. The students were divided into three small groups that were tutored by one teacher. Both the students and the teacher were interviewed. The interaction between the students and their teacher, and the group dynamics of each subgroup, were observed during the tutor sessions. The results showed that the student groups were very different from each other in terms of study success, group dynamics and communication between the group members. One group achieved significantly higher grades than the other two groups. There was only one clear difference between the three groups. The interviews and observations showed that the students in the best group participated more evenly and actively in the discussions than students in the other two groups.     

Integrating Computer-Mediated Communication into an EAP course

The development of the computer along with the widespread use of the Internet has rapidly promoted Computer-Mediated Communication (CMC) as a very important communication media, which can be used widely and effectively in foreign language teaching and learning. This essay tries to explore the advantages of CMC as well as its proposed application, beginning with the introduction of some concepts related to CMC. From the research history, the rationale of using CMC in foreign language learning is summarised. The context of an EAP course is introduced and some suggestions on using CMC in this course are proposed.     

异步电机矢量控制系统仿真研究

异步电动机是一个高阶、非线性、强耦合的多变量系统.文中提出一种异步电动机矢量控制系统方案,并在此基础上设计了一个典型的矢量控制系统,然后利用matlab/simulink仿真软件对该控制系统进行建模与仿真研究.     

异步教学与教育创新

教育创新是由教育理念、教育目标、教育途径和教育方式所构成的教育体系，它体现在创造性的教学活动中，其目的是为了培养具有创造性人格、创造性思维和创造性技能的高素质人才。异步教学是黎世法经过20多年的潜心研究创立的具有创造性活力的教学模式，它是我国新时期基础教育实施新课程标准，培养创造性人才，强化素质教育的难得资源。异步教学与教育创新有十分密切的关系，它对培养、训练学生的创造性人格、思维和技能有独特的功能。