Tan, Aik-Ling

The nature and purposes of science education in Singapore have been, for a long time, an area of debate and concern. Ask teachers, curriculum developers, policy makers, science education researchers, scientists or students about the nature and purpose of science education, you will undoubtedly receive many different answers. The issue of interest here is the understanding of what nature and purposes of science education are among some teachers and students in Singapore. In this paper, we problematize the notion that high school students can think and should be able to think like a scientist. We hope that the discussion generated in this paper will contribute to an increased awareness among teachers and researchers about the issues relating to the nature of school science, learning science and the practices in the science classroom. This study examines two students from a class of 23 girls and their perception of what science is together with their biology teacher in a secondary school. In one of the classroom transcripts, the teacher reminded the students several times to ‘think like a scientist!”. This prompted us to question if the assumption that everyone knows how a scientist operate is valid. In this paper, we attempt to use Membership Categorisation Analysis (Freebody, 2003; McHoul and Watson, 1984) to provide insights into some ideas about science which the teacher and two students from the same school community have explicated. Their interview transcripts constitute the main data source in this paper. The results of this study revealed the complexities of issues relating to the introduction of the notion of nature of scientific enterprise in the secondary biology classrooms.

Research on argumentation has increased our understanding of knowledge construction, group learning, and scaffolding structures in CSCL although analyses of argumentation pose many difficulties. This could be due to the many theoretical positions that can be taken when approaching discourse data. In this paper, we use three popular analytic methods (interactional, content-specific, and linguistic) to compare the same fragment of scientific argumentation by Grade 4 children in Singapore. We show the complementary emphases and strengths of each disciplinary position as well as their weaknesses. The results imply that analytic methods arising from different disciplinary positions can potentially broaden our overall understanding of using argumentation in CSCL.

Scardamalia (2002) discussed the knowledge building notion as one which is built on social cognitive principles of learning. She proposed 12 principles focusing on collaborative knowing among students gearing toward building a community of learners in classrooms. However, how teachers become the key mediator for fostering knowledge building in classrooms is not fully explored. This study aims to contribute to the knowledge building research in terms of teacher professional development. Set in Singapore, where the dominant pedagogy is teacher centred and routinised (Luke, Cazden, Lin & Freebody 2005), this paper examines the journey taken by two biology teachers trying to reform their classrooms by incorporating knowledge building principles. In one of our email exchanges with a teacher, she was exasperated with her attempt to bring knowledge building into her classroom. After a few sessions, she exclaimed “But I have not started teaching!” This prompted us to seek answers to the research question “What are the factors that will impact knowledge building efforts in a Singapore science classroom?” Interviews and transcript analysis of classroom lessons are used as data and interpretive methods of data analysis are used in this paper. The beliefs of the teachers are elicited through a semi-structured interview which takes the form of a post-lesson dialogue in this paper. The results of this study revealed three key areas of concern in adopting knowledge building principles, namely, renegotiation of institutional authority, changing beliefs about teaching, and learning and building students’ capacity for epistemic agency. In order for teachers to transform their practices in the classroom, there needs to be a structured and concerted understanding of these factors.