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Masters Degrees (Science and Technology Education)

Permanent URI for this collectionhttps://hdl.handle.net/10413/7148

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Browsing Masters Degrees (Science and Technology Education) by Author "Dempster, Edith Roslyn."

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    Biology and its recontextualisation in the school curriculum : a comparative analysis of post-apartheid South African life sciences curricula.
    (2009) Johnson, Kathryn Barbara.; Dempster, Edith Roslyn.; Hugo, Wayne.
    This study explored the way biological knowledge is transformed when it moves from its disciplinary form to a high school biology curriculum, and how this occurred in successive versions of the life sciences curriculum implemented in post-apartheid South Africa. Bernstein’s (1996, 1999) conceptualisation of biology as an hierarchical knowledge structure, the recontextualisation of knowledge, and the implications for social justice formed the theoretical framework to the study, as did Aikenhead’s (2006) distinction between traditional and humanistic approaches to science education, and Schmidt, Wang and McKnight’s (2005) concept of curriculum coherence. Firstly, I attempted to elicit core concepts and conceptual organisation in biology from the writings of the distinguished biologist Ernst Mayr, two foundational biology textbooks, and interviews with two professors of biology. Seven concepts emerged: the cell, inheritance, evolution, interaction, regulation, energy flow and diversity, which I arranged in a hierarchy according to Mayr’s “three big questions”, “what?”, “how?” and “why?”. The theory of evolution was highlighted as the key integrating principle of the discipline. Secondly, I considered biology in the school curriculum by means of a literature review and synthesis of the changing goals of a school science education. Five broad categories of objectives were derived: knowledge, skills, applications, attitudes and values , and science as a human enterprise. Aikenhead’s (2006) terminology captured the shifts in emphases of these objectives over time.Thirdly, I analysed the stated objectives and content specifications of the three most recent versions of the South African life sciences curricula – the Interim Core Syllabus (ICS), the National Curriculum Statement (NCS) and the new NCS. The NCS represented a dramatic swing away from the traditional approach of the ICS, while the new NCS reverts to a more traditional approach, though with more humanistic content than in the ICS. Both the ICS and t he NCS were found to be deficient in one of the three key conceptual areas of biology. The conceptual progression of the material is strongest in the new NCS, and weakest in the original NCS. The conclusion was drawn that, of the different curricula, the new NCS has the greatest potential to induct South African learners into the hierarchical structure of biology, and represents a positive contribution to the goal of transforming education in South Africa.
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    A survey of life sciences teachers' understanding of the theory of evolution.
    (2012) Magubane, Gugulethu Primrose.; Dempster, Edith Roslyn.
    The theory of evolution is relatively new to the majority of teachers who teach Life Sciences in South African schools. It was introduced into the Grade 12 Life Sciences curriculum in 2008. The purpose of this study was to examine the subject matter knowledge of Life Sciences teachers regarding the theory of evolution. Furthermore the study aimed at finding out about the challenges that the Life Sciences teachers encounter during the teaching of evolution to their learners and how they deal with those challenges. This study also aimed to contribute to the field of research regarding Life Sciences teacher’s understanding of the theory of evolution in a South African context. The focus of the research was on the teachers who were teaching Life Sciences at Grade 12 level in 2008. This study was underpinned by the conceptual framework developed by Lee Shulman (1986; 1987). Shulman (1986; 1987) argues that the subject matter knowledge should be the foundation for teaching. The research was conducted within the pragmatic paradigm. The data was collected from the Life Sciences teachers under Vulindlela Circuit in Pietermaritzburg, KwaZulu-Natal. The methods of collection included questionnaires and individual interviews with selected teachers. Quantitative data were analysed using SPSS while qualitative data were analysed using thematic content analysis. The findings indicated that the Life Sciences teachers who were enacting the new curriculum do possess some knowledge of the theory of evolution. However there were some gaps in their understanding of the concepts related to the theory of evolution by natural selection. Probably Life Science teachers will also increase their knowledge and levels of understanding of evolutionary concepts as they teach these year after year. This was evident from the scores of the teachers under the section of genetics. They scored high marks in this section because genetics was introduced into the Biology curriculum more than twenty years ago. Fossils, biogeography and natural selection were introduced in 2008, and teachers had much less knowledge about these topics than about genetics. This study also found that some teachers do encounter problems such as the views of students which contradict with that of evolution by natural selection. Teachers mentioned that they do not know how to handle such problems in the classroom during teaching in a manner that would not criticise religious beliefs of other learners. This study concluded that professional development of teachers in the form of workshops and in-service training should be an ongoing process within the Department of Education in order to help teachers with the ever-changing curriculum.