Learners’ Physical Science performance in South Africa has been under discussion for several years, the challenge being that it has been exacerbated by continuous changes in the curriculum. Systems that have been put in place have yielded insufficient satisfactory solutions to both underperformance in the subject and sustainable good performance. Although interventions by curriculum policymakers have been ineffective, the issue at hand remains that teachers need to implement good teaching practices in order to ensure that all learners receive quality education. Physical Science teachers are custodians of a subject that may address scarce skills in the education system, so the quality of teaching must be optimised. Teachers need to implement intervention processes put in place by other stakeholders to reduce the negative perceptions that most people have about Physical Science. This study investigates how various factors related to the quality of teachers may affect the performance of Grade 12 learners in this subject. Since past studies have presented a broad spectrum of these factors, this study has categorised them as those directly related to teaching and those indirectly related to teaching. As a basis for data collection the researcher first established the overall status of the Physical Science teachers and investigated how the factors identified affect teaching. A mixed method approach was followed, and given the breadth of the study, available raw data was collected through questionnaires, interviews and observations. Data collected on factors indirectly related to teaching showed that these factors affect factors directly related to teaching and both of them affect the performance of the teacher, and consequently those of learners. These findings revealed that the performance of Physical Science cannot be based on one factor only, but on a combination of factors that are interrelated and should be integrated for effective teaching practices. Recommendations have been made to the National and Provincial Department of Education, District offices, school management teams and Physical Science teachers to reinforce other strategies that have been in place in order to improve or sustain good performance of the subject and to close gaps that have not been identified as possible intervention strategies. They include upgrading qualifications with the current content and methodologies to match the changing curriculum, restructuring workshops so that they are informed by the teacher’s needs, stabilising the curriculum to avoid many changes in short periods of time, retraining of teachers, relevant appointment of Heads of Departments (HoDs) into subject management positions, utilisation of support groups by teachers, proper management of the subject, proper screening of Physical Science learners and provision of teaching and learning resources. / Science and Technology Education / M. Ed. (Natural Science Education)

The study investigated South African Grade 10 Physical science learners’ reasoning about basic chemical phenomena at sub-microscopic level. The study adopted a non-experimental, exploratory and descriptive method and was principally guided by the ex-post facto research design using a concurrent embedded strategy of mixed qualitative and qualitative approach. A total of 280 grade 10 physical science learners in their intact classes and six of their teachers participated in the study. The 280 physical science learners comprised of 100 students from two top performing schools, 100 learners from two middle performing schools and the last 80 learners were drawn from two poor performing schools in Gauteng Department of Education’s Tshwane North District. A two-tier multiple-choice paper and pencil Test of Basic Chemistry Knowledge (TBCK) based on the three levels of chemical representation of matter was administered to the 280 physical science learners in their Grade 11 first term to collect both quantitative and qualitative data. In addition to the TBCK, focus group discussions (FGDs) with learners, teacher interviews and document analysis were used to triangulate data. The results revealed that most Grade 10 learners find it easy to identify pure elements and the solid state but find it difficult to negotiate between the three levels (macroscopic, sub-microscopic and symbolic) of chemical representation of matter. It became clear that learners experienced more difficulties in the concepts of basic solutions, acidic solutions, concentration and ionic compounds in solution. It also became apparent that some learners could not tell differences between a diatomic element and a compound indicating conceptual problems when they reason at particle level, and as a result they could not identify a mixture of elements. The results also indicated that the concepts of pure compounds and mixtures of compounds were not easy to comprehend as most learners took a pure compound for a mixture of atoms and a mixture of compounds for a mixture of elements. It is therefore concluded that learners find it difficult negotiating the three levels of chemical representation of matter. However, it is not clear whether the misconceptions the learners showed could be completely attributable to the concepts involved or the nature of the sub-microscopic models that were used in the test as it was also revealed that most teachers were not using sub-microscopic representations during instruction to enable learners to think at particle level. Furthermore, justifications to the multiple-choice tasks revealed lack of understanding of basic chemical concepts as well as language problems amongst learners as they could not clearly express their reasoning. Based on the results, some recommendations to educators, chemistry curriculum planners, teacher education and the chemistry education research field are suggested. / Science and Technology Education / D. Phil. ((Philosophy in Mathematics, Science and Technology Education)

Grade 12 learners in one Namibian secondary school participated in a study of science process skills implied in their International General Certificate of Secondary Education (IGCSE) physical science syllabus. The study aimed at finding out learners’ ability to identify science process skills in their physical science syllabus, criteria used to identify skills and whether any relationship existed between learners’ achievement in performing skills and learners’ ability in identifying the skills. Four physical science syllabus topics were taught. Learners performed and identified science process skills in learning and assessment tasks. A One Group Pretest-Posttest research design was used in a combined qualitative and quantitative research method. Data revealed that learners identified science process skills. Science processes performed during learning experiences were used as criteria to confirm presence of the skills. Learners’ achievement increased in performing and identifying science process skills after intervention activities. There seemed no relationship between learners’ achievement in performing and learners’ ability in identifying science process skills. / Science and Technology Education / M. Ed. (Natural Science Education)

The exploratory study investigated school related factors responsible for high matriculaion failure rates in physical science in public high schools of Alexandra Township in South Africa. The target population included all Further Education and Training (FET) science educators and learners in Alexandra Township. An extreme-case sampling method was used to select a sample of two schools. Data was collected through two different closed questionnaires, one for educators (n=10) and the other for learners (n=250). The results were analyzed using mainly descriptive tatistics. The results, according to the views and opinions of educators and learners showed that the main causes of high failure rates are poor educator qualifications, outdated teaching methods, massive workloads, high levels of absenteeism and acute deficiencies in aspects related to: resources, subject content, classroom management skills, proficiency in language of instruction and assessment, motivation and perseverance. Recommendations for practice and policy are suggested. / Further Teacher Education / M. Ed. (Natural Science Education)

Not only is Quantum Mechanics (QM) conceptually rich, it is also a theory that physics students have found abstract and technically formidable. Nevertheless, compared to other classical topics of physics, university students’ understanding of QM has received minimal attention in the physics education literature. The principal purpose of this study was to characterize the variation in the ways that undergraduate physics students depict the basic concepts of QM and to extrapolate the results to scaffold possible changes to instructional practices at the university that provided the context for the study. In so doing, an adaptation of a developmental phenomenographic perspective was chosen. Empirically, the study was approached through in-depth interviews with 35 physics students from two Ethiopian governmental universities after they had been exposed to the traditional QM course for one-third of a semester. Interview responses were analyzed using phenomenographic approach where a picture of students’ depictions was established for each quantum concept by expounding the given responses. For each basic quantum concept addressed, the structure of the description categories was separately constructed, and overall, it was found that naive, quasi-classical ontology and/or variants of classical ways of visualization are dominant in students’ responses. For example, it was found that students’ depictions of the photon concept could be described with three distinct categories of description, which are (a) classical intuitive description, (b) mixed model description and (c) quasi-quantum model description. Similarly, the findings revealed that it is possible to establish three qualitatively different categories of description to picture students’ depictions of matter waves, namely, (a) classical and trajectory-based description, (b) an intricate blend of classical and quantum description and (c) incipient quantum model description. Likewise, it was found that students’ depictions of uncertainty principle can be described as: (a) uncertainty as classical ignorance, (b) uncertainty as measurement disturbance and (c) uncertainty as a quasi-quantum principle. With regard to learning QM, the categories of description made clear several issues: most students did not have enough knowledge to depict the basic concepts of QM properly; they were influenced by the perspective of classical physics and their perceptions in making explanations about QM; and they also applied mixed ideas, one based on their classical model and the other from newly introduced QM. These results are also supported by the findings of previous studies in similar domains. Findings from the study were used to guide the design of multiple representations-based instructions and interactive learning tutorials on the conceptual aspects of QM that has been shown to address specific difficulties identified in the study. Theoretical and practical implications of the study, as well as potential future considerations are drawn. / Mathematics, Science and Technology Education / D. Phil. (Mathematics, Science and Technology Education)

This study investigated the effects of incorporating English language teaching in Physical Sciences education. The sample was selected from Physical Sciences Grade 10 learners in a school in Mpumalanga Province and comprised an experimental group who were taught through a workbook that incorporated language teaching in science lessons and a control group who were taught via the normal textbook prescribed by the Department of Basic Education. Pre- and post-tests were administered to both groups and a sample of learners participated in a focus group interview. Two educators were also individually interviewed. The results revealed that incorporating language teaching in science lessons not only improves learners’ academic performance but also their comprehension skills, and encouraged the application of learner-centred methods of teaching. The study recommends that Physical Sciences textbooks include English language activities with the view of incorporating language teaching in Physical Sciences content lessons. / Science and Technology Education / M. Ed. (Natural Science Education)

Practical work forms an integral part of physical science. Most schools in Venda have no laboratories for practical work. Teachers use the telling method. Students learn by rote. They learn without understanding science concepts. They cannot apply their knowledge to real life situations. This research investigates the use of equipment from inexpensive material in teaching physical science. Teachers trained to improvise equipment use them in classroom teaching. These help teachers to understand many science concepts and use the process approach in their teaching. The research found that when science is taught through experiments with improvised apparatus, student learning occurs at various domains of science education. The bad effects of lack of facilities for practical work are mostly eliminated. Meaningful learning leads to the understanding of science concepts. Students construct their own knowledge, apply it to any situation and enjoy learning the subject. / Curriculum and Instructional Studies / M. Ed. (Didactics)

Not only is Quantum Mechanics (QM) conceptually rich, it is also a theory that physics students have found abstract and technically formidable. Nevertheless, compared to other classical topics of physics, university students’ understanding of QM has received minimal attention in the physics education literature. The principal purpose of this study was to characterize the variation in the ways that undergraduate physics students depict the basic concepts of QM and to extrapolate the results to scaffold possible changes to instructional practices at the university that provided the context for the study. In so doing, an adaptation of a developmental phenomenographic perspective was chosen. Empirically, the study was approached through in-depth interviews with 35 physics students from two Ethiopian governmental universities after they had been exposed to the traditional QM course for one-third of a semester. Interview responses were analyzed using phenomenographic approach where a picture of students’ depictions was established for each quantum concept by expounding the given responses. For each basic quantum concept addressed, the structure of the description categories was separately constructed, and overall, it was found that naive, quasi-classical ontology and/or variants of classical ways of visualization are dominant in students’ responses. For example, it was found that students’ depictions of the photon concept could be described with three distinct categories of description, which are (a) classical intuitive description, (b) mixed model description and (c) quasi-quantum model description. Similarly, the findings revealed that it is possible to establish three qualitatively different categories of description to picture students’ depictions of matter waves, namely, (a) classical and trajectory-based description, (b) an intricate blend of classical and quantum description and (c) incipient quantum model description. Likewise, it was found that students’ depictions of uncertainty principle can be described as: (a) uncertainty as classical ignorance, (b) uncertainty as measurement disturbance and (c) uncertainty as a quasi-quantum principle. With regard to learning QM, the categories of description made clear several issues: most students did not have enough knowledge to depict the basic concepts of QM properly; they were influenced by the perspective of classical physics and their perceptions in making explanations about QM; and they also applied mixed ideas, one based on their classical model and the other from newly introduced QM. These results are also supported by the findings of previous studies in similar domains. Findings from the study were used to guide the design of multiple representations-based instructions and interactive learning tutorials on the conceptual aspects of QM that has been shown to address specific difficulties identified in the study. Theoretical and practical implications of the study, as well as potential future considerations are drawn. / Mathematics, Science and Technology Education / D. Phil. (Mathematics, Science and Technology Education)

This study investigated the effects of incorporating English language teaching in Physical Sciences education. The sample was selected from Physical Sciences Grade 10 learners in a school in Mpumalanga Province and comprised an experimental group who were taught through a workbook that incorporated language teaching in science lessons and a control group who were taught via the normal textbook prescribed by the Department of Basic Education. Pre- and post-tests were administered to both groups and a sample of learners participated in a focus group interview. Two educators were also individually interviewed. The results revealed that incorporating language teaching in science lessons not only improves learners’ academic performance but also their comprehension skills, and encouraged the application of learner-centred methods of teaching. The study recommends that Physical Sciences textbooks include English language activities with the view of incorporating language teaching in Physical Sciences content lessons. / Science and Technology Education / M. Ed. (Natural Science Education)

Grade 12 learners in one Namibian secondary school participated in a study of science process skills implied in their International General Certificate of Secondary Education (IGCSE) physical science syllabus. The study aimed at finding out learners’ ability to identify science process skills in their physical science syllabus, criteria used to identify skills and whether any relationship existed between learners’ achievement in performing skills and learners’ ability in identifying the skills. Four physical science syllabus topics were taught. Learners performed and identified science process skills in learning and assessment tasks. A One Group Pretest-Posttest research design was used in a combined qualitative and quantitative research method. Data revealed that learners identified science process skills. Science processes performed during learning experiences were used as criteria to confirm presence of the skills. Learners’ achievement increased in performing and identifying science process skills after intervention activities. There seemed no relationship between learners’ achievement in performing and learners’ ability in identifying science process skills. / Science and Technology Education / M. Ed. (Natural Science Education)