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.

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 / abstract / Education / Master / Master of Education

The purpose of the study was to determine the effects of level III video disc instruction on high school biology students. There were three areas studied: students' achievement in biology, students' attitude toward biology, and confidence. The experimental group consisted of 70 biology students. The control group also consisted of 70 biology students. The teacher of the experimental group used level in video disc instruction to teach about invertebrates, vertebrates, human systems, and plants throughout the semester. The teachers of the control group taught the same topics during the same period using the traditional lecture method and without level III video disc instruction. Students took the Biology Achievement Test, the Purdue Master Attitude Scale, and the Confidence in Learning Inventory before and after the treatment period. A t-test on the pretest scores of the experimental group and the control group showed no significant difference between the two groups. The experimental group also took the Technology Preference Survey after the treatment period.

This project constitutes an instructional unit for honors biology that involves the use of science in the field of criminal investigation and forensics. Before beginning the unit, the learners should have mastered basic laboratory skills, including use of the microscope. They should also have an understanding of the basic structure and function of DNA and its role in heredity and protein synthesis. The standard time frame is 24 days with 70-minute periods, but can be easily adjusted to meet classroom needs. Several instructional strategies enhance student learning and make science fun. The unit is inquiry-driven and activity-based. Students are surprised by the crime, gather and analyze evidence, and work towards proposing an explanation. This real world problem involves the use of cooperative learning and a variety of assessment techniques.

M.Ed. / This study focuses on the misconceptions that exist among teachers in the field of unifying themes in Biology teaching. The researcher feels confident that teachers are well underlain in their field of study, and that meaningful teaching occurs in Biology classes. His concern is that the fundamental unifying themes in Biology that enables pupils to reach higher cognitive levels of thought, are not utilised fully in pupils and teachers, learning and training. Investigations of these phenomena are being done through misconceptions that may occur at teachers of Biology. This forms the main aim of the study. The researcher feels that the fewer misconceptions' teachers have, the better students will be taught. Qualitative and quantitative research methods are being used to maximise the research effectiveness. Trough these methods the researcher found that teachers are well underlain in their studies but lack utilisation of unifying themes in the learning environment. Teachers concentrate on one or two themes, ignoring the remainder. The researcher hopes to make a meaningful contribution to the teaching of Biology as well as to improve the quality of teacher training programs in Biology didactic courses through awareness of these phenomena.

A research report submitted to the University of Witwatersrand, Faculty of Humanities, in partial fulfilment of the requirements for the degree Masters of Arts (Coursework and Research Report) University of the Witwatersrand, 2016 / This research investigated how sex and sexuality is being represented within Sexual Health Education (SHE), as reported by students who completed matric in 2014. Furthermore, this study wanted to investigate how these representations contributed to the perceived value of the SHE. In South Africa, SHE is located within the curriculum of Life Orientation (LO), a compulsory subject through to Grade 12. Despite being compulsory, there is no external moderation for this subject, allowing schools and teachers to decide on the exact content being taught within LO. The theoretical framework of Social Representations Theory (SRT) guided this research. SRT states that our understanding of the world is based on a collection of social representations, accumulated through interactions with the social world. The school environment is a place where social representations are often challenged by new information covered in lessons, as well as in discussions with peers and teachers outside of class. This study was interested in what social representations are being re-presented in the context of SHE. Five focus group discussions were conducted, following a semi-structured interview schedule, informed by the literature review. The sample consisted of first year students at a Johannesburg university, who completed their secondary schooling in 2014. The findings of this study show that South African youth receive vastly different information, some of which is not complete or accurate. Participants felt their SHE failed to assist them in making adult decisions, as there was a sense that vital information was being withheld, and the information that was imparted within SHE was viewed as irrelevant. This was attributed to the societal taboo against speaking openly about topics of sex and sexuality, which was often perpetuated in the ways that sex and sexuality were socially represented within SHE. / MT2017

In AP Biology, the course goal, with respect to scientific acts and reasoning, has recently shifted toward a reform goal of science practice, where the goal is for students to have a scientific perspective that views science as a practice of a community rather than a body of knowledge. Given this recent shift, this study is interested in the gaps that may exist between an individual teacher’s instructional goal and the goals of the AP Biology course. A Cultural-Historical Activity Theory (CHAT) methodology and perspective is used to analyze four teachers’ knowledge, practice, and learning. Teachers have content knowledge for teaching, a form of knowledge that is unique for teaching called specialized content knowledge. This specialized content knowledge (SCK) defines their instructional goals, the student outcomes they ultimately aim to achieve with their students. The study employs a cultural-historical continuum of scientific acts and reasoning, which represents the development of the AP Biology goal over time, to study gaps in their instructional goal. The study also analyzes the contradictions within their teaching practice and how teachers address those contradictions to shift their instructional practice and learn. The findings suggest that teachers have different interpretations of the AP Biology goals of science practice, placing their instructional goal at different points along the continuum. Based on the location of their instructional goal, different micro-communities of teachers exist along the continuum, comprised of teachers with a shared goal, language, and culture of their AP Biology teaching. The in-depth study of one teacher’s AP Biology teaching, using a CHAT perspective, provides a means for studying the mechanisms that connect SCK to classroom actions and ultimately to instructional practice. CHAT also reveals the nature and importance of contradictions or cognitive dissonance in teacher learning and the types of support teachers need to recognize contradictions and to internalize and set their instructional goal, facilitating their learning. Without recognition of contradictions, some of these micro-communities are not aware that their instruction is not in line with the AP Biology goal of science practice. An in-depth look at teacher learning revealed the criticality of reflective practice and the need for an “expert” within a teacher’s community to facilitate = learning and develop SCK to incorporate science practice in classroom instruction.

In 2015 the U.S. continues to struggle with academic achievement in public schools. Average test scores from 15 year olds taking the Program for International Student Assessment placed the U.S. as 38th out of 71 countries (Drew Devlin, 2017). It is common to discuss elimination of the achievement gap as the single most effective way to improve the U.S.'s mediocre standing among the highest scoring countries in the world in primary and secondary student test scores (McGhee,2004; Flemming 2012). In the broadest sense of the term the "achievement gap" refers to the difference in academic success between different groups of students. It is often used to describe the lower performance of underprivileged student populations (National Education Association, 2004). Attempts to understand why this GAP exists and how educators may narrow such GAPs, researchers have identified both large class size and lack of personalized instruction as two conditions that commonly accompany lower academic achieving student populations (Lee and Buxton, 2008). Although there is a wealth of literature attempting to assess the effect of class size, few studies have defined small and large class sizes. In her research, Sarah Leahy (2006) defines a small class as one containing between 13 and 17 students and a regular class as one containing between 22 and 25. For the purposes of this research, a large classroom is defined as one with over 25 students. In theory, computer-based instruction (CBI) offers great potential to expand on the concept of personalized instruction. However, there is very little research available that describes how this tool can be used to effectively enhance the classroom learning process. This study examines the impact of providing computer-based instruction (CBI) or teacher-led instruction on students of various achievement levels enrolled in a traditional, high school biology classroom. The high school in which this research as conducted is a Title One (low income) identified school. 111 from four sections of freshman high school biology, were randomly divided into two learning groups per section. Both groups in each section were taught one 50-minute lesson on cellular biology. One group received the lesson from CBI while the other group from teacher-led instruction. The impact on learning was measured by the change in pre- and post-test scores. All students in each section received the same lesson content which was provided in the same classroom concurrently. Data from 82 students that returned signed parental consent forms and took the pre-test on day one, the lesson on day two, and the post-test on day three, were analyzed in this study. Results: The twenty students ranked as high academic achievers scored the highest correct answers on pre- and post-tests (mean 7.1 and 9.4 respectively). Improvement in test scores, measured as mean number of additional correct answers on the post-test, for the high achievers was equal whether they received CBI or teacher-led instruction (+1.72 and +1.75 respectively). Twenty-seven middle ranked academic achieving students also showed a statistically equal degree of improvement from each instructional platform. However, middle students that scored the highest pre-test scores also produced the highest improvement from CBI. The thirty-five low academic achieving students produced the highest improvement in test scores overall from teacher-led instruction and produced a mean negative change in post-test scores from CBI (mean +2.13 and -.68 respectively). Findings from this study suggest that in a classroom setting, higher academic achieving students will learn equally well from CBI or from a teacher while lower achievers benefit more from small group, teacher-led instruction.

The literature contains conflicting ideas about the effectiveness of diagrams, and their constituent symbolism as teaching and learning tools. In addition, only limited research has been specifically conducted on the presentation and interpretation of arrow symbolism used in biology diagrams, let alone on the nature, source and remediation of student difficulties caused by arrows. On the basis of this limited research and 30 years of experience of teaching biology at secondary-level, the author suspected that students might have difficulties interpreting arrow symbolism in diagrams used as explanatory tools and decided to thoroughly investigate this issue. The hypothesis, 'Secondary-level students have difficulty with the use of arrow symbolism in biology diagrams' was formulated and the following broad research questions defined to address the hypothesis: 1. How much of a problem is arrow symbolism in diagrams? 2. How effectively is arrow symbolism used in diagrams to promote the communication of intended ideas? 3. To what extent does the design of arrow symbolism in diagrams influence students ' interpretation and difficulties? 4. How can the emerging empirical data and ideas from literature be combined to illustrate the process of interpretation of arrow symbolism? 5. What measures can be suggested for improving the presentation and interpretation of arrow symbolism in biology diagrams at secondary-level? To address Research question 1, a content analysis of all arrow symbolism in seven popular secondary-level biology textbooks was undertaken. This revealed a wide diversity of arrow styles, spatial organisations, purposes and meanings that could be confusing to students. These results suggested the need for an evaluation of the effectiveness of arrow symbolism (Research question 2). As there was no definitive set of guidelines available for specifically evaluating arrows, general guidelines from the literature on diagrams were used to develop a set of 10 criteria, to evaluate the syntactic, semantic and pragmatic dimensions of arrow symbolism, which were validated by selected educators, students and a graphic design expert. Application of the criteria (which constituted expert opinion) to the arrow symbolism used in 614 realistic, stylised and abstract diagram types, revealed a relatively high incidence (30%) of inappropriately presented arrow designs that could mislead students. To establish whether this problem could be the cause of student difficulties, and to thereby address Research question 3, a stylised and an abstract diagram were selected and evaluated according to the criteria. The results of the evaluation were compared to the responses given by 174 students to a range of written and interview probes and student modified diagrams. In this way, student performance was correlated with expert opinion. The results confirmed that students experience a wide range of difficulties (26 categories) when interpreting arrow symbolism, with some (12 categories) being attributable to inappropriately presented arrow symbolism and others (14 categories) to student-related processing skills and strategies at both surface- and deeper-levels of reasoning. To address question 4, the emerging empirical data from the evaluation and student studies was combined with a wide range of literature, to inform the development of a 3-level, non-tiered model of the process of interpretation of arrow symbolism in diagrams. As this model emphasised the importance of both arrow presentation in diagrams and arrow interpretation by students, it could be used as an effective explanatory tool as well as a predictive tool to identify sources of difficulty with the use of arrow symbolism. This model was, in turn, used to inform the compilation of a range of guidelines for improving the presentation and interpretation of arrow symbolism, and so target Research question 5. These, and other guidelines grounded in the data and relevant literature, were suggested for all role players, including students, educators, textbook writers, graphic artists and researchers, to use as remedial tools. Future research should focus on the implementation of these guidelines and studying their effectiveness for improving the presentation and interpretation of diagrams with arrow and other types of symbolism. / Thesis (Ph.D.)-University of KwaZulu-Natal, Pietermaritzburg, 2006.