Teaching electrical circuits in grade 10 physical science using a conceptual change approach

Magister Educationis - MEd (Mathematics and Science Education)The purpose of this paper is to investigate whether the teaching of electric circuits in Grade 10 Physical Sciences using a conceptual change approach would enhance learners' understanding of the concept. The conceptual change approach is a process whereby concepts and relationships between concepts change over the course of an individual's lifetime. The process whereby conceptual change occurs is of central interest in helping to understand the process of learning, and is also important when considering the design of instruction. The study was conducted at a secondary school in a small town in the Karoo. Purposive sampling was used to select the sample of a Physical Science Grade 10 class. A mixed method approach was used to observe the effectiveness of the conceptual change approach - four conditions must exist before a conceptual change is likely to occur: (1) assess learners' dissatisfaction with their existing concepts; (2) the new concept must become intelligible; (3) the new concept must appear plausible; and (4) the new concept must be fruitful. All learners' total scores for the pre-test and post-test were calculated and recorded and total scores were statistically analyzed. This study could provide means to improve science teaching and learning. The learners were assisted to discover what was not clear to them, they were encouraged towards deeper understanding and to use their own knowledge to make sense of new concepts. The conceptual change approach could be used effectively by the teachers as it will assist to remove misconceptions learners have prior to the learning of new science concepts

Enhancing the pedagogical practice of South African physical sciences teachers in inquiry based teaching through empowerment evaluation

Abstract : The purpose of this study was to capture, portray and develop the pedagogical practice of Physical Sciences teachers in inquiry-based teaching using an empowerment evaluation approach. This mixed methods design study is a multiple case study in inquiry-based teaching of three Physical Sciences teachers in South Africa. This research intended to help answer the question: How can an empowerment evaluation approach influence and shift the practice of Physical Sciences teachers towards an inquiry-based pedagogy? The objectives of the study were: (a) to establish the current pedagogical practice of South African Physical Sciences teachers in inquiry-based teaching, (b) to determine the challenges experienced by Physical Sciences teachers in implementing an inquiry-based teaching approach, and (c) to examine shifts in the pedagogical practices of Physical Sciences teachers in inquiry-based teaching using an empowerment evaluation approach. The data collection methods were semi-structured interviews, classroom observations and the Pedagogy of Science Teaching Test - Physical Sciences (POSTT-PS) instrument. Baseline results from the first phase of the study revealed that teachers in township schools practiced predominantly structured investigations when doing practical work. Another finding in this phase was that teachers prioritize the data collection phase in inquiry over other stages during their inquiry-based teaching. The research revealed that inquiry-based teaching in township schools is hampered by a lack of resources, unprepared learners, insufficient time and the pressure of summative assessments. The teachers were eager to shift their pedagogical practice to that of inquiry. In phases two and three, an empowerment evaluation approach was applied to support teachers in shifting their practices towards inquiry-based teaching. Empowerment evaluation is the use of evaluation concepts, techniques, and findings to foster improvement and self-determination (Fetterman, 2001:3). It focuses on helping people help themselves and improve through self-evaluation and reflection. The use of self-evaluation as a means of assisting teachers to improve their pedagogical practices provides a non-threatening environment for reflection and experimentation. Empowerment evaluation allows the participating teachers to craft a solution to their local challenges. Over a longitudinal period, the study revealed shifts in each of the following teacher practices:..Ph.D. (Education

A study of the implementation of scientific investigations at grade 9 with particular reference to the relationship between learner autonomy and teacher support.

Thesis (Ph.D.)-University of KwaZulu-Natal, Durban, 2007.The purpose of the study was to investigate the implementation of scientific investigations at Grade 9. The study focussed in particular on the autonomy learners have in doing scientific investigations, and the strategies that teachers employ in supporting learners when they are doing investigations. The study adopted a mixed methodology research design which involved the collection of both quantitative and qualitative data. The quantitative data was collected by means of questionnaires which were administered to teachers and learners. Qualitative data was collected by means of classroom observations, teacher interviews and learner interviews. The general trends that were quantitatively established were validated and explicated by the qualitative analysis. A finding of the study was that at schools where scientific investigations are taking place, the learners have varying degrees of autonomy across the different stages of the investigation. In general, autonomy increases from little autonomy at the start when formulating the investigation question to significant autonomy in drawing conclusions. The study also revealed that both teachers and learners believe that when learners do their own investigations, it facilitates conceptual understating, leads to the development of scientific skills, and helps to motivate learners. In addressing the question of teacher support, the study found that teachers support learners by asking questions at all stages of the investigations, offering suggestions when necessary, giving learners a prompt sheet, and instructing learners in the use of practical techniques. Finally, the study identified class size, the availability of resources, the availability of time, and teacher competence as significant factors which affect the degree of learner autonomy in the implementation of scientific investigations in the classroom. These findings have implications for the implementation of scientific investigations at schools. Firstly, the findings it is believed will inform the practice of teachers who would want to introduce learner-centred investigations in their teaching. Secondly, the study has identified factors which will need to be considered by curriculum planners if the scenario of learners doing their own investigations is to become a reality in South Africa

The effect of a cross-cultural instructional approach on learners’ conceptions of lightning and attitudes towards science

Doctor EducationisThis study looks at the effect of a cross-cultural instructional approach on the learners’ conceptions of lightning and attitude towards science. It explored Basotho conceptions of lightning and thunder under the following themes: nature of lightning, protection against lightning, animalistic/humanistic behaviour of lighting and nature of wounds inflicted by lightning

Exploring the lexical and semantic access afforded by novice and experienced Namibian physical science teachers’ talk during electricity and magnetism lessons

Challenges to learners’ meaning-making in the topic of electricity and magnetism contributes to underperformance in grade 10 Physical Science in Namibian schools. Teacher talk in content-based classrooms not only contributes to learners’ language development (Gibbons, 2003), but also facilitates meaning-making and cumulative knowledge-building (Halliday, 1999). However, it is possible that there are differences between the classrooms talk of novice and experienced Namibian Physical Science teachers. An understanding of differences between experienced and novice Namibian science teacher talk could inform teacher training and professional development and potentially help improve learners’ meaning-making in topics such as electricity and magnetism. However, no study could be found in the Namibian context which explored whether novice and experienced teacher talk afforded similar semantic and lexical access to meaning-making. This research gap provided a strong rationale for undertaking the study reported in this thesis. The study sought to investigate the extent to which novice and experienced grade 10 Namibian Physical Science teachers’ classroom talk provides semantic and lexical access to learners for the topic of electricity and magnetism. The research is informed by Legitimation Code Theory (LCT) and Systemic Functional Linguistics (SFL). Research has shown that the two theories are complementary and can be used to characterize teachers’ pedagogical practices (Maton, 2014). A quantitative case study methodology was followed in this study with LCT’s semantic density and SFL’s lexical density as analytical tools to analyze the two teachers’ classroom talk. The results from a t-test for semantic density show that there is a significant difference in the means for “semantic density waving” criterion (t-value of -2.331; p-value for 2 tail test at 95% level of 0.0040) and for the “linking downward escalators or single references” criterion (t-value of 4.649; p-value for 2 tail test at 95% level of 0.001) of teacher talk by the teachers. The overall results for semantic density indicate that the experienced teacher affords better epistemological access through semantic waves than the novice teacher, whereas the novice teacher affords better epistemological access through semantic range and semantic flow. In terms of lexical density, both teachers afforded similar access, characterized by their talk veering towards the level of information density associated with written text. The study makes a methodological contribution to science education research through its characterization of novice and experienced teachers’ talk in terms of semantic waves and lexical density. This study also provides empirical insight into the differences between language use by novice and experienced Namibian Physical Science teachers, which can inform the work of educational institutions, advisory and inspectorate services in the ministry of education, and school managers. Relevant Namibian stakeholders are encouraged to consider including the topics of semantic density and lexical density, in continuous professional development programmes towards improving the meaning-making affordances of science teachers’ talk.Thesis (MEd) -- Faculty of Education, Education, 202

Students' conceptions of simple D.C. electricity circuits: a study of primary, inappropriate conceptions, learning difficulties of physics students, and implications for instruction

The work attempts to identify the general conceptual problems of the generations of Black students who pass through flrst year physics courses at the University of Fort Hare. In particular the alternative conceptions of students in the area of direct current electricity are investigated, using various techniques including written diagnostic tests. The main method used in the investigation of the student frameworks is the personal interview. A varied number of inappropriate conceptions are identifled in the students in significantly large proportions, and these are found to be dependent on many factors; for example the socio-cultural background like language and its metaphors, and media images. It is established that some of these are exacerbated by student perceptions about the nature of physics and of the scientific enterprise in general. Certain proposals are made about how to remedy the situation; relying mainly on the recently established innovative instructional strategies like conceptual change and cognitive conflict, and on making proposals about restructuring certain forms of presentation of the subject matter, paying attention to how language is used to address the speciflc problems of the students. The importance of providing practical experiences for the students is also emphasise

Science teachers' transformative and continuous professional development : a journey towards capacity-building and reflexive practice

This study was conducted in Grahamstown in the Eastern Cape, South Mrica. Triggered by the demands of South Mrican post-apartheid curriculum transformation, the study focused on establishing a sustainable science teachers' trans formative and continuous professional development (TTCPD) network with the view to improving their practice. It is premised on the assumption that teachers are capable of taking responsibility for their own professional development. It is a case study carried over a period offour years with a group of eight teachers. Rooted in the socially critical-emancipatory orientation in conjunction with the participatory action research approach, and located in the qualitative and interpretive research paradigms, it focuses on doing research in democratic and egalitarian ways through working with teachers rather than on them. Such a stance supposes a collaborative partnership and a dialogic relationship viewed as being both reciprocal and mutually enriching for the teachers who were seen as co-learners and co-researchers in this study. Two main goals of the study may be identified. For the first goal, the actors in this study established a sustainable and participative approach to professional development. This was explored through the formation of a TTCPD network which was informed by the actor-network theory framework. Our focus was on co-construction of scientific knowledge utilising the development and adaptation of learning and teaching support materials (LTSMs) as a catalyst to drive the process. The second goal was to examine how the TTCPD network enhanced the teachers' subject-content knowledge, pedagogical-content knowledge as well as individual and collaborative reflections. The research process evolved into three mam phases: The initial phase involved adapting and modifying LTSMs which were initially used in conjunction with microscale science kits and pilot tested with a group of Grade 10 students. This led to the second phase of the research project, which was aimed at gaining insights into the science teachers' capabilities in developing teaching and learning units of work. ii \ The second phase focused on the development of a collaborative orientation to the development of LTSMs and culminated in the formation of sub-networks responsible for certain tasks within the broader network. AB common ground, we focused on developing teaching and learning units of work on the following science topics: electrostatics, electricity, and electrochemistry, to illuminate and foster integration within science. The third phase was concerned with gaining insights into the science teachers' practice in their classrooms. This phase focused on putting theory into practice through the collaborative implementation of teaching and learning units of work. Feedback on the lessons was discussed during our workshops as an attempt to further enhance collaborative reflections. Data was generated usmg workshop discussions with reflective notes; active interviews; focus group discussions; co-teaching, participant observation and videotaped lessons with reflective notes; and a research journal. A variety of data generation techniques were employed to enhance validity and quality of the research. Techniques for validation and trustworthiness of data included triangulation; member checks orface validity; prolonged engagement; catalytic validity and peer validation. The study exposed the underlying historical, ideological and epistemological contradictions of the teachers' past educational backgrounds. It emerged that the ways in which they were taught were at times an inhibitor to innovativeness, perpetuating transmissive approaches to teaching and learning. Lack of professional development and support, and the tensions between policy formulation and implementation exacerbated this. Reflections from the teachers' experiences further revealed that, for teachers to be effective agents of change in the reform process, empowerment opportunities are vital. AB a result, exposure to the TTCPD network was useful in capacitating the teachers with the development of LTSMs, which led to the enhancement of their pedagogical, and science content knowledge conceptual development as well as collaborative reflections.The main findings of this study is that, science teachers' transformative and continuous professional development based on participative approaches and mutual collegial support are indispensable, and that teachers' socio-cultural contexts and experiences should be taken into consideration during this process. Teachers should be regarded as central in the process, and mutual respect and dialogical relationships are pivotal. A further recommendation of this study is that capacity-building is critical for quality teaching and learning, and there is a need to move beyond the rhetoric of complacency to pro-activism, supporting ongoing development of teachers in professional transformative networks.KMBT_363Adobe Acrobat 9.54 Paper Capture Plug-i

Alternative assessment strategies within a context-based science teaching and learning approach in secondary schools in Swaziland

Philosophiae Doctor - PhDThe aim of this study was to use a case study approach to explore and describe how students and teachers perceived performance assessment and context-based assessment models that were used within a real world context teaching and learning approach. The topics Electricity and Air and Living Things formed the science knowledge base for the study. Four junior secondary school science teachers and their students in four schools participated. Participants; experiences of the assessment models were achieved through teachers administering and scoring performance assessment tasks and context-based unit tests to their students. Perceptions were obtained through questionnaires and interviews from students. Interviews and informal discussions were used to elicit teachers; perceptions. Observations during the administration of performance assessment tasks were also used for triangulation.South Afric

Exploring the effects of computer simulations in developing conceptual understanding of Grade 10 learners in direct current circuits.

Masters Degree. University of KwaZulu-Natal, Durban.Physical sciences are perceived as difficult by learners in high school in South Africa and beyond. One of the challenging topics in Physical sciences is the topic of electricity. The Physical sciences National Further Education and Training examiners’ reports over the years have highlighted that learners in this topic scored less marks compared to other topics in national examinations. The researcher was then curious to find out why learners have difficulty with the topic of electricity. The project intends to explore if there are any better ways to learn the topic of electricity. In the process, the researcher intends to make possible recommendations on how best to plan for and teach the topic of electricity. A study was then undertaken at a school in KwaZulu-Natal to determine if the use of computer simulations can enhance the understanding of this topic of electricity. First, all participants were exposed to traditional instruction and then a conceptual test was administered to determine the alternative conceptions they had on the topic of electricity. After the test, participants were split into groups. One group was treated to computer simulations and another group continued with traditional instruction. During the administration of the computer simulations, video data were collected to examine the behaviour of learners during an intervention with computer simulations. In order to understand the depth of the alternative conceptions and to have an insight into learners thought processes, interview data were also collected to triangulate the concept test data and video data. Therefore, this study followed a mixed methods design where quantitative data and qualitative data was collected at the same time. Quantitative data were collected using a concept test and qualitative data were collected using video and interview schedules. An analysis of the test scores before implementation of computer simulations showed that participants held a number of alternative conceptions on the topic of electricity. A post-test analysis showed that the group exposed to computer simulations had a significantly high average score compared to the group that continued with traditional instruction. Details of the reasons for the improved scores after using computer are discussed in detail in this report. One of them, among others, is the greater visualisation that PhET simulations bring when analysing direct current circuits. Teachers and curriculum developers would gain a lot of insight on how to plan and teach the topic of electricity more effectively by going through this research report

THE RELATIONSHIP BETWEEN REFORMED TEACHING AND STUDENTS’ CREATIVITY IN A CHINESE MIDDLE SCHOOL

Current education reform in both the United States and China promotes a reformed inquiry-based approach based on the constructivist learning theory. This study contributes to the research literature by exploring the relationship between reformed science teaching and students’ creativity. Chinese education is often criticized for a lack of creativity by some news media (Stack, 2011). This study was designed to explore the creativity of students and the extent to which inquiry instruction is used in the science classroom. The study used a convenience sample of two classes from a middle school located in Wuhu city, Anhui province, China. A total of 120 students and 3 science teachers participated. A mixed-methods research approach was adopted for integrated explanation. Student surveys, the Torrance Test of Creative Thinking (TTCT), Verbal, Reformed Teaching Observation Protocol (RTOP), and semi-structured interview were utilized as research tools for collecting quantitative and qualitative data. The findings indicate that there was a positive relationship between reformed teaching and students’ creativity (F (2, 117) = 19.760, p<.001). Classroom observation generally indicated that the participating teachers were skillful at promoting conceptual understanding and provoking high-level thinking. However, evidence of student-centered instruction was less apparent. The semi-structured interviews with participating teachers showed a positive attitude toward inquiry-based teaching but also revealed several challenges. The findings from the Verbal TTCT and classroom observation provided evidence of Chinese students’ creativity. Directions for future research are provided