M. Ed. (Science Education) / South African Life Sciences teachers have been subjected to three policy changes during the past six years. The first new curriculum was implemented in 2006, and when it was found that this curriculum lacked sufficient botany content, a new version of the curriculum was implemented in 2009. Following this, a new curriculum was being implemented in 2012 in all subjects, leaving Life Sciences teachers fatigued as a result of all the professional development workshops they had to attend each year. One principle of the new curriculum was that teachers had to use a constructivist approach to teaching, but research had found that this was not the case in South African classrooms. Furthermore, research also showed that some South African teachers lacked the necessary content and pedagogical knowledge to teach science to grade 12 learners. The aim of this study was to see whether teachers’ pedagogical content knowledge could be improved by the use of communities of practice over a period of time. The content that was focused on was DNA, protein synthesis, meiosis and genetics, as these topics were flagged as problematic topics in the National Senior Certificate examinations in 2008. A generic qualitative design was used as this research was situated in an interpretive framework. The genre of the research was phenomenology with design based elements. Before the intervention started, teachers had to complete a questionnaire and this questionnaire had to be completed again after the intervention. Interviews and feedback tools were used to obtain teachers’ views on these communities of practice. The interviews also had a section that pertained to teachers’ pedagogical content knowledge. Structured classroom observations were used to see whether teachers were implementing a constructivist approach when teaching the content. It also served as a method to ascertain whether the activities done during the community of practice sessions were implemented into classroom practice. It was found that communities of practice are an effective way of developing teachers’ pedagogical content knowledge, but that it should be continuous and would be more v effective over a longer period of time. Teachers also enjoyed these meetings, shared resources and motivated each other. Another finding of this research was that teachers did not implement a constructivist approach to their teaching as required by the new curriculum, even though they indicated that they preferred this approach to teaching. A recommendation of this research is that teachers’ professional development should take place in an informal community of practice where teachers could share ideas and resources. A keystone species is required for these communities of practice to stay sustainable. These communities of practice should be implemented on a continuous basis in order to have a positive effect on teachers’ practice.

M.Ed. (Science Education) / The topic of evolutionary theory is new to the South African Life Sciences curriculum, having only been introduced in 2008 to the grade 12 cohort. A great deal of controversy and discussion surrounds the teaching and learning of evolution in many countries, and since the introduction of the topic, including South Africa. The primary source of this controversy arises from the conflict that many Christian and Muslim people experience between what their respective religions teach them about the act of Creation by God and the biological theory of evolution. As a result of its recent inception into South African school, not much research has been done to explore how this topic is experienced by Hindu secondary school learners and teachers. The aim of this study is therefore to address two gaps, firstly to add to the almost total lack of information about the Hindu perspective of the topic of evolution. Secondly, to add to the knowledge base of the teaching and learning of evolution in secondary schools since the scant information available on the teaching and learning of evolution in South Africa is mainly confined to tertiary education. Literature was reviewed on various aspects relevant to this study such as the PCK, NOS, CCC, Hinduism and the teaching and learning of evolution overseas and locally. In order to investigate the lived experiences of Hindu Life Sciences teachers and learners to the topic of evolution a qualitative study with elements of phenomenology was the chosen research design. This prompted the need to use a series of focus group and individual interviews with the various role-players as laid out by the overarching conceptual framework CHAT, the lens through which this study was viewed. Triangulation of data increased the reliability and validity of this study and was obtained by interviewing a Hindu priest as well as Hindu parents of Life Sciences learners. Interviews were transcribed, coded using the coding model by Saldana (2009) and analysed according to common themes. The main finding of this study was that Hindu teachers and learners experience no conflict with the topic of evolution thus displaying a lack of major tensions linked to the CHAT model. Many Hindus are however ignorant of their religion and scriptures but nevertheless remain accepting of the theory of evolution. Their acceptance could be attributed to three major tenets of Hinduism that link to evolutionary concepts: the cyclical concept of time; the evolution of the soul during reincarnation and the idea that during times of calamity, God manifests on Earth in the form of Avatāras. Misconceptions of evolutionary theory abound among learners and to a lesser extent the parents and teachers, particularly with respect to the notion of common ancestry. The teachers had adequate PCK but their knowledge of the NOS was limited. Recommendations emerging from these findings therefore warrant greater attention to the NOS in both PRESET and INSET teacher training courses. These courses can also use the lack of tensions between the Hindu religion and the topic of evolution as a case in point to show that religion and science can exist in harmony with each other. The concept of a nearest common ancestor (NCA) should also be emphasised in these courses – thereby helping to dispel the misconception that humans descended directly from apes.

This study emerged in response to the poor performance in Biology at my school. The Ministry of Education Biology (NSSCO) Examiners’ report (2011) for Paper 3 indicates that learners proved to have difficulties in designing experiments, failed to give a distinction between apparatus and the experiment. The 2012 Examiners’ report on transpiration also highlights that learners were not exposed to practical work. Furthermore, the 2012 report notes that teachers need to work on their learners’ drawing and spelling of terms. It is against this backdrop that a qualitative study was conducted at a school in Oshikoto, using a sample of two teachers. The study’s purpose was to investigate how grade 11 Biology teachers mediate learning of the topic on transpiration. Social Constructivism and Pedagogical Content Knowledge formed the framework used to analyse data gathered from document analysis, interviews and observations. The study findings were that teachers use locally available material for demonstration during practical work, elicit prior knowledge, use a chalkboard to summarise content to learners, and use a question and answer method as strategies in mediating learning on transpiration. In addition, the teachers use homework, scaffolding activities, group work, code-switching, feedback on activities, as well as the use of analogies. Despite efforts by participant teachers to mediate learning of transpiration, shortage of equipment for conducting practical work, poor English proficiency among teachers and learners, and little emphasis on graphing by the syllabus proved to be barriers to their efforts. This study thus recommends that in order to improve on teaching transpiration, teachers need to co-plan lessons, conduct practical work, code-switch during lessons, ensure effective assessment, and include lessons on graphing. Furthermore, teachers need continued training on how to teach transpiration.

This research was undertaken by a group of practising teachers as a collaborative effort to develop a cooperative approach to the teaching of Biology at Secondary School level. The research focussed on Grade 10 learners at three different schools over a period of one full academic school-year. During this time, four complete cycles within an action research framework were completed and reflected upon. Learners were then surveyed by means of a questionnaire and follow-up interviews. The reflective sessions, together with the responses from the questionnaire and interviews, provided a wealth of information with regard to the development of a cooperative approach to teaching. The cooperative classroom is vastly different from the traditional one. Here, new roles are assumed by both teacher and learner. Learners are largely expected to take charge of their learning experience in the classroom. The teacher, while still responsible for facilitating this learning experience, delegates authority to the learners. It was the experience of the group that the relationship between teacher and learner, as well as between learner and learner, vastly improved in the cooperative class where the participants were more relaxed. Over time, learners became more accountable in terms of their work and learning. Learners’ self-esteem and self-confidence grew, and the majority of learners indicated that their understanding of the work improved. Furthermore, the cooperative structure encouraged and developed self-discipline in the learners. In the early stages of this research, the group did find certain behaviour to be inhibiting: excessive noise, laziness, too much tomfoolery, and absenteeism. These problems were easily addressed within the action research framework, and were nearly non-existent by the end of the research. The group also found that: (i) cooperative lessons required more time than traditional lessons, often at the expense (justifiably) of the syllabus, and that: (ii) cooperative lessons played a major role in reactivating learner interest towards the learning process both in and outside the classroom.

This thesis is the result of an examination of the biological and physical science information content included in late nineteenth and early twentieth century elementary school readers and textbooks.

The proposed biology curriculum for non-majors has one main objective, namely to improve scientific literacy among college students. The National Science Education Standards defines scientific literacy as "the knowledge and understanding of scientific concepts and processes required for personal decision making, participation in civic and cultural affairs, and economic productivity". The suggested strategies to accomplish this goal are to limit the number of topics covered, introduce relevant scientific terminology, emphasize general biological concepts and themes, and hone critical thinking and problem-solving skills. Activities such as group projects, written and oral assignments, and class discussions are effective tools to assess student ability to communicate scientifically. It is also important for students to make connections between the course subject matter and how it affects real life events.

The field of science education, specifically biology, is becoming more challenging due to richer and more rigorous content demands. Along with new demands is the emergence of National Common Core Standards and End of Course Exams. Despite these changes, one factor remains consistent: As content knowledge increases, language demands also increase. For students with learning disabilities (LD), specifically those with language-based disabilities, the increasing vocabulary demand can lead to failure due not to a lack of understanding biology but the vocabulary associated with the content. In an attempt to impact high school students with learning disabilities‘ success in biology, a vocabulary intervention was investigated. Research suggests as more and more content is compressed into science courses, teachers are looking toward technology to assist with vocabulary mastery. The current research study examined the effects of a digital flash card intervention, Study Stack, versus a paper flash card intervention in biology for students with LD by measuring students‘ word knowledge and overall biology course achievement. Findings from repeated measures ANOVA showed a statistically significant increase on both the vocabulary assessment as well as the course grades in biology over time. However, the test of between effects considering card type yielded no differential change on vocabulary assessment and course grades in biology. Based on qualitative data, students interviewed liked the tool and found it to be helpful in learning biology terminology.

I interviewed women in different fields of biological science and analyzed the interview data by picking out emerging themes. I compared these themes with issues in the feminist literature and with accounts from the social studies of science. Women in biology are far from developing alternative epistemologies, but see themselves as different from their male colleagues in several important respects. They expressed the difficulties in balancing demanding scientific careers with private lives which usually include partners and often included children. At the same time, single women often face problems which married women do not. I conclude that women scientists married to scientists in different specialties may be particularly advantaged. I examined interviewees' attitudes towards collaboration and cooperation both within their laboratories and between interviewees and their scientist peers. I found women biologists frequently describing caring and non-hierarchical relationships within their laboratories. They contrast these with the ambitious and authoritarian attitudes of their male peers. They had a tendency to either work on projects only within their own laboratories. Several described difficulties experienced in collaborating with other investigators. I suggest that there are a number of factors which lead to women scientists publishing less on average than men in science. Among these are numerous competing demands upon women's time, problems with collaboration, and differing personal expectations to those of men. / Ph. D.

Standardized aptitude and achievement tests are often accompanied by directions which recommend skipping items perceived as difficult and returning to answer them if time permits. Prior to the present study, the only empirical research in this area was a single study concerning the effects of examinee decisions to follow or disregard these instructions. It was the conclusion of this research that it was to the advantage of high ability examinees to follow the instructions to skip but that conformity to the instructions was disadvantageous to middle and low ability examinees. The present study, in contrast, was concerned with the effects of differing instructions concerning skipping and was quasi-experimental in design. The sample consisted of 423 eighth through twelfth grade students of algebra and biology. Intact classes representing three ability levels were assigned at random to treatment conditions consisting of instructions to skip, not to skip, and with no advice concerning skipping (only “skip” and “do not skip” instructions for the algebra classes.) Schoolwide tests were administered using special answer sheets designed to identify skipped items even when examinees later returned and answered some or all previously skipped. The scores from these tests were used in determination of end-of-course grades. The primary dependent variables were number-right test scores and the number of items skipped. For each subject area, two, two-way factorial analyses of variance evaluated the effect of the differing instructions across ability levels, one for the number-right scores and one for the number of items skipped. For the algebra test, there was no significant treatment effect for number-right scores. However, there was a significant interaction (p≤.01) between ability level and treatment, with high ability examinees receiving “do not skip” instructions performing significantly worse than their counterparts who received “skip” instructions. For the biology test scores, the main effect for treatment and its interaction with ability were not significant (p>.05). For the number of skips in both algebra and biology, the main effect for treatment was significant (p<.01), with the fewest skips in the “do not skip” groups. In addition, for the number of skips in algebra, the main effect for ability was significant (p<.05) with the fewest skips in the middle ability group. While the instructions apparently had their intended effect, and while the treatment-ability interaction in algebra was consistent with the findings of prior research, the number of items skipped by groups instructed to do so were not large, and groups instructed not to skip had meaningful number of skips nevertheless. Thus it was not surprising that neither the biology scores nor the algebra scores differed significantly according to treatment. Extensive secondary analyses of item and other statistics provided no basis for explaining the interaction between ability and treatment for the algebra scores. It was concluded that instructions to skip items had relatively little effect for tests of the type employed in this study. / Ph. D.

published_or_final_version / Education / Master / Master of Education