<p><font size="3"> <p>The purpose of this study was to investigate the difficulties encountered by the grade ten township learners with respect to the concept of electricity. More specifically, the study attempted to explore the learners&rsquo / scientific knowledge by investigating their conceptions or alternative conceptions about electricity / the influence of learners&rsquo / age, career interests and gender issues on their conceptions of electricity and / the effectiveness of concept mapping (a pedagogic tool designed by Novak in the 1970s) in facilitating the learners&rsquo / understanding of electricity. The study was premised on socio-cultural constructivism as well as meaningful learning as espoused by Ausubel (1968). A Pre-Test-Post-Test Control Group Design was adopted in the study in which two comparable groups were used. The data was analyzed using both qualitative and quantitative research methods and the instruments that were used included a conception of electricity (COET) (originally adopted and administered in the Western Cape, Northern Cape provinces and in Norway in 1999 for the purpose of Science and Technology Literacy Project (STLP) with the hope that their reliability and validity was guaranteed) / selected learner interviews and evaluation forms. The summary of findings has suggested that the Grade ten learners held misconceptions about the concept of electricity even after they were exposed to intervention that included concept mapping. In terms of the gender issues, there was no significant difference in performance between the boys and girls though the females outperformed their male counterparts at both groups. The underachievement of the older learners compared to the younger ones has also surfaced and that is against expectation since a number of studies carried out earlier (see Ogunniyi (1999)) have already corroborated such findings. With respect to career interests, what the learners indicated as their future dreams, i.e. what they intend to do and become, seems to have been influenced their performance at the pre- and post-test stages.</p> </font></p>

The purpose of this study was to investigate the effects of conceptual change oriented instruction accompanied by demonstrations and gender on tenth grade students&rsquo / understanding of gases concepts, and attitudes toward chemistry. Hundred tenth grade students from two classes taught by the same teacher in a public high school were enrolled in the study in the Fall semester of 2003-2004. Control group students were taught by traditionally designed chemistry instruction (TI), while experimental group students were instructed by conceptual change oriented instruction accompanied by demonstrations (CCID). Gases Concept Test and Attitude Scale toward Chemistry were administered to both groups as a pre-test and post-test to assess the students understanding of gases concepts and students&rsquo / attitudes toward chemistry, respectively. Science Process Skills Test was given at the beginning of the study to determine students&rsquo / science process skills. Learning Style Inventory was also given to all students to determine their learning styles. After treatment, interviews were conducted with the teacher and several students from the two groups. The hypotheses were tested by using analysis of covariance (ANCOVA) and two-way analysis of variance (ANOVA). The results showed that CCID caused significantly better acquisition of the scientific conceptions related to gases than TI. There was no significant effect of the treatment on the students&rsquo / attitudes toward chemistry. No significant effect of gender difference on students&rsquo / understanding the concepts about gases and students&rsquo / attitudes toward chemistry was found. Science process skill was determined as a strong predictor in understanding the concepts related to gases.

Philosophiae Doctor - PhD / The aim of the study was to investigate the nature of biology practical work and associated discourses in two Namibian secondary schools. The purposive sample consisted of three biology teachers and 36 grade 11 students who enrolled for NSSC Higher- and Ordinary-level biology in 2004 and 2005. The study adopted a descriptive and an in-depth qualitative design involving the use of interviews and observation schedules (Video Observation Quoting Schedules-VOQS). The quality of VOQS instruments were established through a panel of independent experts who critically assessed the quality of the items and later discussed to reach consensus. Their rating of the items helped in the establishment of interrater reliability.

No description available.

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 study describes the teaching of scientific investigations by Life and Natural Sciences educators in the Bushbuckridge Region in Mpumalanga Province, South Africa. A quantitative survey method was exploited using a Cluster sampling method. The study was conducted a year after the introduction of the National Curriculum Statement in Grade 10, in South African schools. The study found that most educators use teacher-centred teaching methodologies rather than open inquiry in teaching scientific investigations. Schools still have a shortage of infrastructure, teaching resources and references, which make it difficult for the educators to shift towards the expected new system of teaching. Teachers are confronted with language barriers, heavy workload and insufficient retraining in the new curriculum. / Science and Technology Education / M.Ed.

The study describes the teaching of scientific investigations by Life and Natural Sciences educators in the Bushbuckridge Region in Mpumalanga Province, South Africa. A quantitative survey method was exploited using a Cluster sampling method. The study was conducted a year after the introduction of the National Curriculum Statement in Grade 10, in South African schools. The study found that most educators use teacher-centred teaching methodologies rather than open inquiry in teaching scientific investigations. Schools still have a shortage of infrastructure, teaching resources and references, which make it difficult for the educators to shift towards the expected new system of teaching. Teachers are confronted with language barriers, heavy workload and insufficient retraining in the new curriculum. / Science and Technology Education / M.Ed.

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 purpose of this study was to evaluate the undergraduate biology practical instructions and the level of competence of undergraduate biology students in practical laboratory skills in some Ethiopian universities using skill performance rubric and questionnaires. A sample of 208 third year students and 26 instructors and laboratory assistants from three universities were selected as sample of the study. Students reported that more than 84.2% of the laboratory activities are below the average number of laboratory activities recommended by the curriculum with no significant difference between universities. The laboratory skill performance test score was below the midpoint. None of the students could be able to estimate and determine fields of vision of a microscope. There is a significant and a positively linear relationship between the students’ grade point average (GPA) with identification of laboratory equipment, handling of microscope, setting of microscope, estimation of diameter of field of vision and measuring liquid. Laboratory skill performance test score is correlated with higher education entrance exam score but not with students’ high school laboratory back ground. There is no significant difference in instructor’s manipulative skills among universities (p ≥ 0.09) and instructors manipulative skills is neither correlated with qualification nor teaching experience (P≥0.056). The most common method of assessment instructors’ use in the laboratory is laboratory report and identification of specimen examination (46.4%) and written exam and identification of specimen examination (35.7%). The number of courses having laboratory manuals is as low as 14.3%, in the new university. Manipulating materials, measuring and using numbers, and pre lab activity were common activities, and were found in every manual and in every university. Moreover, the result also revealed that the manuals contain high percentage rate of basic science process skills (75.4%) as compared to the integrated science process skills (24.6%). Correlation and multiple regression analyses revealed that students’ laboratory performance skills is significantly positively correlated with higher education entrance exam score, availability of laboratory resources and instructors experiences. Instructors’ experience has significant positive regression weights / Life and Consumer Sciences / D. Phil. (Mathematics, Science and Technology Education)

Thesis (MEd (Curriculum Studies)--University of Stellenbosch, 2009. / AFRIKAANS OPSOMMING: Die prosevaardighede en die vermoë om ‘n wetenskaplike ondersoek uit te voer deur graad nege leerlinge, is ondersoek. Die begrip van hierdie vaardighede, byvoorbeeld waarneming, meting en data versameling, sowel as die beredenerings wyses tydens die oordrag van die bevindinge (resultate) van die ondersoek, is ook geëvalueer. Die proses in totaliteit is geëvalueer deur die gebruik van drie take insluitende geskrewe ondersoeke, onderhoude en waarnemings. Twee-en veertig Natuurwetenskap leerlinge van die primêre skool het aan die ondersoek deelgeneem. Die geskrewe ondersoek was die grondslag (fundamentele) aktiwiteit om die leerlinge se begrip van ‘n wetenskaplike ondersoek te evaluur. Die onderhoude was onderverdeel in vyf afdelings insluitende die doel, die belangrikheid, die voordele van die verstaan van prosesvaardighede, sowel as die probleme en uitdagings ondervind terwyl die leerlinge aktief betrokke was by of self besig was met die uitvoering van wetenskaplike ondersoeke. Die meerdeheid data (inligting) was verkry deur die waarneming van leerlinge wat saamwerk tydens die uitvoering van die ondersoekeie ondersoeke. ‘n Ontleding van die leerlinge se prestasie in die opdragte, individueel, sowel as in groep verband is gedoen. ‘n Ontleding van die leerlinge prestasie het getoon dat min leerlinge voldoende (bevredigende) begrip toon aangaande data (inligting) versameling en die oordra (kommunikasie) van die bevindinge (resultate). Die resultate van die ontleding onthul (toon) dat die gedeeltelike bereiking van die vereistes vir die uitvoering van ‘n wetenskaplike ondersoek die norm was. Hierdie leerlinge se waarnemings en meetings was onakkuraat, kon slegs sommige veranderlikes identifiseer, het slegs basiese wyses gebruik om die inligting (data) te versamel en te verwerk, en die oordrag (kommunikasie) van resultate was onvoldoende. / ENGLISH ABSTRACT: This research study explored Grade 9 learners’ process skills and their ability to conduct a scientific investigation. The understanding of these skills, for example observation, measurement and data collection, that these learners drew upon, and the way they reasoned while communicating their findings in the investigation, were also examined. This whole process was evaluated using three tools: a written survey, interviews, and observations of 42 Natural Sciences learners at the primary school. The written survey was the base-line tool to evaluate the learners’ understanding of scientific investigation. The interviews were done in five categories: the purpose of scientific investigation, the role and the advantages of understanding process skills, the problems and challenges encountered when learners are performing scientific investigations and experiences gained in conducting a scientific investigation. The main body of data was obtained from observing learners working cooperatively in the actual process of conducting scientific investigations. An analysis of their performance of tasks, both individually and as part of the group, was conducted. An analysis of the sample of learners’ performances revealed that few learners display a satisfactory understanding of how to collect data and communicate their findings. Instead, only a partial achievement of the requirements of conducting a scientific investigation was the norm. These learners observed and measured inaccurately, identified only some variables, established only simple trends in the process of collecting data, and did not form enough structure to communicate their findings.