This study investigated Lesotho junior secondary science teachers’ perceptions and use of laboratory work in teaching. Teaching is described as engagement in a relationship between a person called a teacher and another person called a student with the purpose of facilitating the student’s acquisition of content which the student previously lacked (Fenstermacher, 1986). Using the constructs of scientific inquiry and inquiry-based instruction and constructivism as theoretical lenses the study empirically explored the Junior School Science teachers’ perceptions of the aims of laboratory work and how the teachers used laboratory work in their teaching. At the centre, the investigation sought to understand whether there was any relationship between teachers’ perceptions of the aims of laboratory work and their use of laboratory work. The sample of the study consisted of fifty science teachers (n=50) conveniently selected from 12 schools in the Butha-Buthe district of Lesotho. Data were collected through closed and open ended questionnaires (n=50), semi-structured interviews (n=5), and laboratory lesson observations (n=2). Data were analyzed quantitatively using descriptive statistics and qualitatively using a combination of typological and interpretational analysis. The results show that as a group the sampled teachers held the view that the most important aim of laboratory work was to promote conceptual understanding. In their teaching, most of the sampled teachers use laboratory work to verify theory through largely verificationist, expository and non-inquiry laboratory instructional practices and strategies. The following barriers were reported by the teachers as limiting their use of inquiry oriented and student centered teaching strategies: limitations of resources; time constraints; large classes; pressure to complete the prescribed curriculum; safety issues; and preparations for external examinations. The results also suggest that the teachers’ seeing laboratory work as important for developing conceptual understanding is associated with their use of verificationistic teaching approaches. It is recommended that; Lesotho science curriculum be reviewed, and that teachers should participate in curriculum development to enhance successful implementation of inquiry instruction, professional development programmes be established, and the enactment of inquiry instruction be systematically monitored and evaluated. It is recommended that curriculum developers facilitate teachers’ transformation from expository to inquiry instruction.

In this submission I explore the role played by discourse in the development of pupils' understanding of school-subject knowledge in secondary school classrooms in England, following changes to GCSE (General Certificate of Secondary Education) specifications in 2015. Changes to the structure, the subject content, and the assessment of GCSEs were made in an effort to focus on 'powerful knowledge' during the Key Stage (KS) 4 curriculum (for pupils aged 14 - 16 years old) and in order to promote an emphasis on knowledge that is based on academic disciplines. My research looks at the concept of powerful knowledge, based in a critical realist epistemology and a social realist theory of knowledge, and the extent to which all young people are likely to access knowledge that is powerful in the classroom. I argue that access for all pupils to the means by which to judge knowledge claims and thereby challenge and change society - the transformational power of knowledge - underpins a social justice agenda. My research explores a less-developed aspect of the social realist debate on powerful knowledge, a pedagogic discourse to enable a move away from merely teaching factual or content knowledge. I propose that for knowledge to be powerful teachers and pupils need to be 'epistemologically aware'. My case-study research contributes new empirical findings to the literature on pedagogic discourse for a powerful knowledge curriculum. I discuss the learning trajectories of 15 pupils (including five from socio-economically disadvantaged backgrounds) from two Year 10 'case' classes observed over a 12-week period, during which they studied a novel as part of their GCSE English literature course. 'Thinking notes' and concept mapping were introduced as innovative data-gathering and analytical tools with which to gain a unique and detailed analysis of pupils' learning over the series of lessons given during the 12-week period. I discuss the teachers' conceptual framing of their discipline and the role that this, together with pupils' experiences and backgrounds, has in the re-contextualisation of discipline-based knowledge in the classroom. I conclude that pedagogic discourse that makes the epistemic logic and related concepts of a subject explicit - an epistemological awareness - may enable pupils from both disadvantaged and non-disadvantaged socio-economic backgrounds to build systems of meaning that transcend their everyday understanding of the world and the context in which they view it to access powerful knowledge. I present a conceptualisation of a powerful knowledge pedagogic discourse for the study of a novel in the KS4 English literature classroom.

Task interpretation is a critical first step in the process of self-regulated learning and a key determinant of the goals students set while learning and the criteria used in selecting the strategy in their work. Laboratory activities have been proposed to improve students' conceptual understanding when working independently and alongside peers while integrating new experiences in a lab setting. The purpose of this study was to investigate how the explicit and implicit aspects of student's interpretation of the task assigned during laboratory work may change during the task process, and how that interpretation may influence the student's coregulation and conceptual understanding. One-hundred and forty-three sophomore students enrolled in the course of Fundamental Electronics for Engineers participated in this study. Instruments designed to measure task interpretation and conceptual understanding were created and validated in a pilot study. They were applied before and after selected laboratory activities during the semester. The instrument used to measure correlation was applied at the end of every selected laboratory activity. Statistical analysis indicated differences between the student's task interpretation before and after the laboratory activity. Students improved in approximately 15% in the level of task interpretation. From the 143 students, only 37 of them were identified with high levels of task interpretation and coregulation. Moreover, Pearson correlations identified a positive correlation between the students' task interpretation and conceptual understanding of the students during the laboratory work. Findings suggested students' task interpretation changed during the task process and increased after the completion of laboratory activity. Overall, the findings showed a low level of task interpretation. However, students with a high level of task interpretation reached high levels of coregulation. Findings confirmed previous research that round students generally have an incomplete understanding of the assigned tasks, and struggle to establish a connection between laboratory activities and theory. Lastly, this study reported a significant relationship between students' task interpretation and conceptual understanding in laboratory work which has not been reported in the most recent published reports. Further investigation is necessary to unveil other factors related to these constructs in order to engage students in laboratory work.

This is a thesis which contributes to research in two different fields: theoretical physics and physics education research. The common link between these two research areas is that both involve explorations of abstract physics and mathematical representations, but from different perspectives. The first part of this thesis is situated in theoretical physics. Here a cosmological scenario is explored where a de Sitter phase is replaced with a phase described with a scale factor a(t) ~ tq, where 1/3<1. This scenario could be viewed as an inflationary toy model, and is shown to open up the possibility of an information paradox. This potential paradox is resolved even in the worst case scenario by showing that the time scales involved for such a paradox to occur is of the order of magnitude of the recurrence time for the de Sitter space. The second part of this thesis is situated in physics education research. A number of learning situations that are experienced as abstract by students are explored: probability in one dimensional quantum tunnelling; the mindsets that students adopt towards understanding physics equations used in typical teaching scenarios; and what students focus on when presented with physics equations. The results for the quantum scattering study are four phenomenographic categories of description, for the mind sets study, six epistemological components of mindsets and for the focus on physics equations study, three foci creating five levels of increasing complexity of ways of experiencing physics equations.  Pedagogical implications of these results are discussed.

This study aims to develop assessment which measures learning progressions for important scientific concepts such as oxidation-reduction (redox) and to identify students¡¦ zone of proximal development (ZPD) through teaching practice incorporating assessment feedback. The assessment items of redox were developed based on the framework of the BEAR (Berkeley Evaluation and Assessment Research) Assessment System. Six experts from chemistry, science education, and educational assessment, and three high school chemistry teachers with fruitful instructional experiences were recruited into the assessment team. Through 24 panel discussions, 28 ordered multiple-choice items were developed. Two samples of Taiwanese middle-school students participated in the test development: one for item revision and the other for validation. Sample 1 and 2 consisted of 626 middle school students (304 8th graders and 322 9th graders) and 903 9th graders, respectively. The materials for instruction integrated assessment feedback were designed by the researcher and two middle-school science teachers through seven group meetings. A teaching experiment was implemented to examine the effect of assessment feedback on students¡¦ understandings of redox and to identify their ZPD. The teaching experiment employed a quasi-experiment with a non-equivalent-group pretest-posttest design. Participants were 196 eighth graders (101 boys and 95 girls) from three middle schools. The findings showed that (a) the BEAR assessment system and Rasch measurement approaches provided a feasible framework for developing validated tools to assess learning progressions; (b) the empirical data supported students¡¦ learning of redox concept usually progressed ¡§from uni-structure to multi-structure¡¨ and ¡§from discrete sub-concepts to integrated concepts¡¨; (c) the teaching practice integrated assessment feedback effectively facilitated students¡¦ understanding of scientific concepts; (d) the assessment of learning progressions provided a mechanism for identifying students¡¦ ZPD and helped realize the abtract idea of ZPD in teaching practices. The main contributions of the study included (a) demostrating how to carry out the idea of ZPD into teaching practices through linking learning progressions and ZPD; (b) presenting how to apply BEAR assessment system and Rasch techniques to develop tools for assessing learning progressions; (c) developing a set of items for assessing learning progressions of redox and a series of materials for teaching practices integrated assessment feedback.

The purpose of this study was to investigate the influence of argumentation based instruction on sixth grade students

Students’ struggle with learning mathematics is often cast in a negative light. Mathematics educators and researchers, however, suggest that struggling to make sense of mathematics is a necessary component of learning mathematics with understanding. In order to investigate the possible connection between struggle and learning, this study examined students’ productive struggle as students worked on tasks of higher cognitive demand in middle school mathematics classrooms. Students’ productive struggle refers to students’ “effort to make sense of mathematics, to figure something out that is not immediately apparent” (Hiebert & Grouws, 2007, p. 287) as opposed to students’ effort made in despair or frustration. As an exploratory case study using embedded multiple cases, the study examined 186 episodes of student‐teacher interactions in order to identify the kinds and nature of student struggles that occurred in a naturalistic classroom setting as students engaged in mathematical tasks focused on proportional reasoning. The study identified the kinds of teacher responses used in the interaction with the students and the types of resolutions that occurred. The participants were 327 6th and 7th grade students and their six mathematics teachers from three middle schools located in mid‐size Texas cities. Findings from the study identified four basic types of student struggles: get started, carry out a process, give a mathematical explanation, and express misconception and errors. Four kinds of teacher responses to these struggles were identified as situated along a continuum: telling, directed guidance, probing guidance, and affordance. The outcomes of the student‐teacher interactions that resolved the students’ struggles were categorized as: productive, productive at a lower level, or unproductive. These categories were based on how the interactions maintained the cognitive level of the implemented task, addressed the externalized student struggle, and built on student thinking. Findings provide evidence that there are aspects of student‐teacher interactions that appear to be productive for student learning of mathematics. The struggle‐response framework developed in the study can be used to further examine the phenomenon of student struggle from initiation, interaction, to its resolution, and measure learning outcomes of students who experience struggle to make sense of mathematics. / text

This mixed methods status study examined 32 fourth grade students’ conceptual understandings of energy flow through ecosystems prior to instruction and 40 eighth grade students’ conceptual understandings of the same topic after five years of daily standards-based instruction in science. Specific ecological concepts assessed related to: 1) roles of organisms; 2) the sun as the original energy source for most ecosystems; and 3) interdependency of organisms. Fourth and eighth grade students were assessed using the same three-tiered forced-choice instrument, with accompanying tasks for students to defend their forced-choice selections and rate their level of confidence in making the selections. The instrument was developed for the study by a team of researchers and was based on similar tasks presented in the research literature. Distractor options were embedded in each assessment task using common non-scientific ideas also reported in the research literature. Cronbach’s alpha values at or greater than .992 for each task indicated inter-rater consistency of task answers, and Rasch analysis was employed to establish the reliability of the instrument. Qualitative and quantitative analyses were employed to assess the data. Constant comparative methods were employed to analyze students’ written responses, which were coded and grouped into emerging themes. These themes were further developed to characterize students’ conceptual understandings. Student open responses also were scored and coded by a team of researchers using a rubric to identify level of scientific understanding. Quantitative analyses included Rasch analysis used to normalize survey data. Independent samples t-tests were then employed to compare students’ forced-choice responses to their written responses and to the confidence ratings, as well as to compare fourth and eighth grade students’ responses. Findings indicated that eighth grade students generally outperformed the fourth grade on both the forced-choice and written responses, but both groups demonstrated conceptual difficulties in all three topics assessed. Thus, results from the current study support the assertion that students’ understanding of concepts related to energy flow in ecosystems is not at the expected level according to national science education standards and frameworks. Conceptual difficulties identified in the study are discussed along with implications and curricular recommendations.

This quantitative study explored the impact of literacy integration in a science inquiry classroom involving the use of science notebooks on the academic language development and conceptual understanding of students from diverse (i.e., English Language Learners, or ELLs) and low socio-economic status (low-SES) backgrounds. The study derived from a randomized, longitudinal, field-based NSF funded research project (NSF Award No. DRL - 0822343) targeting ELL and non-ELL students from low-SES backgrounds in a large urban school district in Southeast Texas. The study used a scoring rubric (modified and tested for validity and reliability) to analyze fifth-grade school students’ science notebook entries. Scores for academic language quality (or, for brevity, language) were used to compare language growth over time across three time points (i.e., beginning, middle, and end of the school year) and to compare students across categories (ELL, former ELL, non-ELL, and gender) using descriptive statistics and mixed between-within subjects analysis of variance (ANOVA). Scores for conceptual understanding (or, for brevity, concept) were used to compare students across categories (ELL, former ELL, non-ELL, and gender) in three domains using descriptive statistics and ANOVA. A correlational analysis was conducted to explore the relationship, if any, between language scores and concept scores for each group. Students demonstrated statistically significant growth over time in their academic language as reflected by science notebook scores. While ELL students scored lower than former ELL and non-ELL students at the first two time points, they caught up to their peers by the third time point. Similarly, females outperformed males in language scores in the first two time points, but males caught up to females in the third time point. In analyzing conceptual scores, ELLs had statistically significant lower scores than former-ELL and non-ELL students, and females outperformed males in the first two domains. These differences, however, were not statistically significant in the last domain. Last, correlations between language and concept scores were overall, positive, large, and significant across domains and groups. The study presents a rubric useful for quantifying diverse students’ science notebook entries, and findings add to the sparse research on the impact of writing in diverse students’ language development and conceptual understanding in science.

abstract: Students may use the technical engineering terms without knowing what these words mean. This creates a language barrier in engineering that influences student learning. Previous research has been conducted to characterize the difference between colloquial and scientific language. Since this research had not yet been applied explicitly to engineering, conclusions from the area of science education were used instead. Various researchers outlined strategies for helping students acquire scientific language. However, few examined and quantified the relationship it had on student learning. A systemic functional linguistics framework was adopted for this dissertation which is a framework that has not previously been used in engineering education research. This study investigated how engineering language proficiency influenced conceptual understanding of introductory materials science and engineering concepts. To answer the research questions about engineering language proficiency, a convenience sample of forty-one undergraduate students in an introductory materials science and engineering course was used. All data collected was integrated with the course. Measures included the Materials Concept Inventory, a written engineering design task, and group observations. Both systemic functional linguistics and mental models frameworks were utilized to interpret data and guide analysis. A series of regression analyses were conducted to determine if engineering language proficiency predicts group engineering term use, if conceptual understanding predicts group engineering term use, and if conceptual understanding predicts engineering language proficiency. Engineering academic language proficiency was found to be strongly linked to conceptual understanding in the context of introductory materials engineering courses. As the semester progressed, this relationship became even stronger. The more engineering concepts students are expected to learn, the more important it is that they are proficient in engineering language. However, exposure to engineering terms did not influence engineering language proficiency. These results stress the importance of engineering language proficiency for learning, but warn that simply exposing students to engineering terms does not promote engineering language proficiency. / Dissertation/Thesis / Ph.D. Curriculum and Instruction 2012