Browsing by Subject "Science education"
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Item The context of a rural professional learning community(2015-05) De Zeeuw, Audrey R.; Barufaldi, James P.; Marshall, Jill; Hughes, Joan; Marder, Michael; Stroup, WalterThis dissertation is concerned with exploring the context of a rural professional learning community and the interactions between the context and participants, both teachers and facilitators. An interpretive, qualitative, instrumental case study, the format of data collection and analysis used an instrumental case study approach and interviews, classroom observations, field notes, and artifacts. Participants included four teachers across three different rural locales and two facilitators. Data on the six study participants was collected over the 2013-2014 school year. Findings from this study add to research on the understudied rural context as well as work of in-service educators and teacher educators working within and across these communities. First, this study elucidates nine components of the rural context: students, standards, and student learning needs; teachers and teacher learning needs; practices, curriculum instruction, assessment, and the learning environment; organizational culture; organizational structures and leadership; national, state, and local policies; resources; history of professional development; and parents and community. Additionally, this study identifies new roles for professional development facilitators and explores classroom the teaching practices in rural science classrooms. Finally, this dissertation highlights the importance of rural communities on the interactions of facilitators and participants who work in a rural context. Attention to the roles and interactions between facilitators, teachers and the rural context is of utmost importance towards understanding and ultimately improving professional development experiences for these predominantly isolated educators. This work has the potential to directly impact current and future STEM students and ultimately the STEM workforce by improving professional development for science educators and ultimately science students. Therefore, attention to who is working in and around these communities as well as what is happening within the context of the professional development of rural educations is of particular interest for all those working to improve science education.Item Examining kindergarten teachers' beliefs and practices in science education(2014-08) Jeong, Hye In; Brown, Christopher P., Ph. D.This dissertation investigates kindergarten teachers' beliefs and their teaching practices in science education through a qualitative case study. This study addresses these topics by exploring two key issues: First, it illustrates how kindergarten teachers think about teaching science to the students. Second, this study demonstrates how the teachers’ beliefs about teaching science affect the teaching practices in the classroom. The qualitative data was obtained through formal and informal interviews with four kindergarten teachers from a public elementary school. In addition, observation of the science lessons were also conducted. The teachers' beliefs about science education were classified based on Calderhead's (1996) categories about teachers' beliefs: 1) beliefs about students in science classes, 2) beliefs about teaching science classes, 3) beliefs about science as a subject, 4) beliefs about learning to teach science, and 5) beliefs about teachers’ roles in science classes. Based on the categories of teachers' beliefs, this study found a relationship between teachers' beliefs and how they teach science. In particular, the participant teachers preferred hands-on science activities and focused on children's interest in science. Their personal learning history and past schooling experiences appeared to inform their beliefs. However, this research also shows that some of the teachers' beliefs did not match the teaching practices in science lessons. As evidence, contrary to their beliefs, some of the participant teachers did not include as many hands-on activities because of the limited time allowed for science and the characteristics of the topics in science classes. Finally, the findings suggest there are differences between experienced and inexperienced teachers' in the beliefs and practices. For instance, experienced teachers believed that they were able to effectively manage the science classes, whereas inexperienced teachers showed concerns regarding managing the science class. Moreover, the experienced teachers actually demonstrated their expertise in successfully managing the class, while the inexperienced teachers experienced difficulty. Summary of findings, limitation, implications, and future research are discussed.Item How children in a science-centered preschool use science process skills while engaged in play activities(2011-05) McFarlin, Lillian Marie; Reifel, Robert Stuart; Barufaldi, James; Brown, Christopher; Bryant, Diane; Marshall, JillSelf-motivated activities, or play, that children choose to engage in are manifestations of a variety of science process skills being used to construct knowledge about their environment. While many people agree that science skills should be fostered at an early age, due to the possible positive influence of a wider base of experiential knowledge and the development of a love of science, there is a lack of research available to support the development of early childhood science curriculum (Bredekamp & Copple, 1997, Brenneman, Stevenson-Boyd & Frede, 2009). This study follows the daily activities of four- and five-year-old children attending a science-based preschool in the southwestern United States. The play activities of the children were observed for their use of the science process skills of observing, comparing, classifying, measuring, communicating, inferring, predicting and experimenting. A wide range of play activities centered around the foundational skills of observing, comparing, measuring, communicating and inferring. The teachers and students combine to create a unique environment promoting excitement and exploration.Item Investigations in surface tension in thin films and self-diffusion in nanocomposites : lab experiences can help secondary educators better their instructional practices(2012-08) Brophy, Melissa; Ellison, Christopher G., 1960-; Allen, David T.This report documents the experiences and applications to practice of a secondary science teacher, instructional coach, and educational consultant performing academic research on surface tension in thin films and self-diffusion in nanocomposites in a chemical engineering lab setting. Throughout this experience, the author developed knowledge for and of engineering teaching through authentic learning experiences. These learning experiences will be used as a model to assist mentee teachers in developing authentic learning experiences for students that create an awareness of engineering while fostering engineering habits of mind and an understanding of the engineering design process.Item Managing uncertainty in collaborative robotics engineering projects : the influence of task structure and peer interaction(2010-05) Jordan, Michelle E.; Schallert, Diane L.; McDaniel, Reuben R.; Maloch, Anna E.; Emmer, Edmund T.; Borich, Gary D.Uncertainty is ubiquitous in life, and learning is an activity particularly likely to be fraught with uncertainty. Previous research suggests that students and teachers struggle in their attempts to manage the psychological experience of uncertainty and that students often fail to experience uncertainty when uncertainty may be warranted. Yet, few educational researchers have explicitly and systematically observed what students do, their behaviors and strategies, as they attempt to manage the uncertainty they experience during academic tasks. In this study I investigated how students in one fifth grade class managed uncertainty they experienced while engaged in collaborative robotics engineering projects, focusing particularly on how uncertainty management was influenced by task structure and students’ interactions with their peer collaborators. The study was initiated at the beginning of instruction related to robotics engineering and preceded through the completion of several long-term collaborative robotics projects, one of which was a design project. I relied primarily on naturalistic observation of group sessions, semi-structured interviews, and collection of artifacts. My data analysis was inductive and interpretive, using qualitative discourse analysis techniques and methods of grounded theory. Three theoretical frameworks influenced the conception and design of this study: community of practice, distributed cognition, and complex adaptive systems theory. Uncertainty was a pervasive experience for the students collaborating in this instructional context. Students experienced uncertainty related to the project activity and uncertainty related to the social system as they collaborated to fulfill the requirements of their robotics engineering projects. They managed their uncertainty through a diverse set of tactics for reducing, ignoring, maintaining, and increasing uncertainty. Students experienced uncertainty from more different sources and used more and different types of uncertainty management strategies in the less structured task setting than in the more structured task setting. Peer interaction was influential because students relied on supportive social response to enact most of their uncertainty management strategies. When students could not garner socially supportive response from their peers, their options for managing uncertainty were greatly reduced.Item Mars north polar ice stratigraphy project : a curriculum module for 5th grade(2011-08) Chavez, Augustine Faustino; Holt, John W., Ph.D.; Wilson, Clark R.This report is explores the need for a curriculum module for late elementary school students by looking at what drives student interests and motivations in pursuing careers in the sciences. The curriculum module created is composed of visual aids, including video animations, a 3-D scale model, and a hands-on, guided classroom activity. Exploring the stratigraphy on Mars Planum Boreum northern polar ice cap using radargrams from the Mars Reconnaissance Orbiter and modeling sublimation of Carbon Dioxide with a dry ice experiment, the curriculum module will be tested and improved upon over the next academic year in a 5th grade classroom with intent for submission to NASA for funding and eventual dissemination to the general public. The goal of the project is to add new, engaging dimensions to space science activities and to understanding of fundamental geologic principles, using real-time applications to foster interest and motivate students to enter the fields of the geosciences in the future.Item Migration and attrition patterns of Texas secondary science teachers(2012-05) Mount, Jennifer Daniele'; Marshall, Jill Ann; Petrosino, Anthony; Galloway, Heather; Carmona, Lupita; Fuller, EdwardThe focus of this research is to investigate teacher turnover in the form of attrition and migration of secondary science teachers in the state of Texas. This study is to fill the gap in the research pertaining to the relationship of teacher migration and attrition to secondary science teacher qualifications and school characteristics in order to assist stakeholders in developing more effective policies and programs aimed at providing all students with a qualified science educator. The objectives of this study were to 1) determine whether Texas secondary science teachers are migrating and if so, identify schools the teachers are migrating from and to, and 2) determine characteristics of the teachers who migrate or leave teaching by discipline taught, route of certification, years of service and in-field and out-of-field status. This study utilized quantitative research methods, specifically, descriptive statistics displayed as percentages and trends indicated by a novel data representation using vectors. The data used in the study were extracted from the Public Education Information Management Systems (PEIMS) data from the Texas Education Agency and the teacher certification records from the State Board for Educator Certification from 1995 - 2008. After the quantitative results and vector plots were analyzed, the results revealed that a fifth of Texas secondary science teachers are migrating between schools each year. Texas secondary science teachers of lower socio-economical status schools migrated to higher SES schools, while teachers of the highest socio-economical status schools migrated to a lower SES school. Other findings include a high percentage of incoming Texas secondary science teachers are not certified or alternatively certified. The analysis of the Texas secondary teachers showed which teachers are leaving or migrating from certain schools. It can help districts and policy makers to have equity in schools with quality teachers. Since the study used individual teacher and school data, the results can provide valuable information to school leaders, school district leaders, and policy makers at the local and state level as decisions are made regarding the implementation of policies and administrative actions intended to increase teacher retention.Item The role of teacher efficacy in the development of pedagogical content knowledge among experienced science teachers(2014-05) Han, Soon Wook; Barufaldi, James P.The purpose of this qualitative study was to examine the developmental process of pedagogical content knowledge (PCK) among experienced science teachers. Since teaching is a "learned profession" (Shulman, 1987) centered on a unique set of knowledge, PCK becomes a critical avenue to investigating the roots of effective teaching. Research suggests that PCK develops and grows through classroom practice (Lederman, Gess-Newsome, & Latz, 1994; van Driel, Verloop, & de Vos, 1998; van Driel, De Jong, & Verloop, 2002). In addition, teacher efficacy has been argued to be an "affective affiliate" of PCK (Park, 2007) indicating an association between empowered teachers and knowledge growth. Therefore, this study examined the role of teacher efficacy in sustaining PCK growth among experienced teachers to better comprehend the mechanism of action of classroom teaching experience. This collective case study involved three experienced high school science teachers who have been teaching for at least eight years. Data collection involved the use of classroom observations coupled with teacher interviews. In addition, instruments used in data collection included the use of the CoRe/PaPeRs (Content Representation/Pedagogical and Professional Experience Repertoires) template for validating PCK episodes (Loughran, Mulhall, & Berry, 2004; Loughran, Berry, & Mulhall, 2006) as well as the Science Teaching Efficacy Belief Instrument (STEBI) that was used to evaluate efficacy levels. Data analysis indicated teacher efficacy plays a pivotal role in developing PCK through a system of validation and evaluation of the teacher's cognitive belief structure. Furthermore, it was determined that as teachers gain classroom teaching experience, their sustained PCK growth is the result of increasing their knowledge of student understanding.Item A statistical analysis of the effects of project-based learning on student high school and college outcomes(2015-05) Craig, Tara Theresa; Marshall, Jill Ann; Azevedo , Flavio; Beretvas, Susan N; Marder, Michael; Riegle-Crumb, CatherineThis dissertation research study is an analysis of the effects of project-based learning on a cohort of high school students’ achievement on mathematics and science standardized tests and graduation rates. The study also investigates college enrollment and first year grade point averages (GPA) for students taught solely through project-based instructional methods in high school. In the 21st century, STEM fields dominate our work force, but there is a decline in interest and persistence towards these fields that can be traced back to high school achievement in mathematics. The people that are choosing and prepared for STEM majors and careers are not representative of the US population, as they are lacking ethnic and gender diversity. The underlying premise is that inquiry-based teaching practices engage and motivate students leading to increased learning; however this premise is not currently fully supported with empirical research. This research compares students that attended a high school that teaches all courses through project-based learning with a matched control group of students. I first analyzed the demographic makeup of students that chose to apply to Manor New Tech, a STEM-focused, PBL school. Then, I developed multiple linear regression models that allowed me to determine that students attending the PBL school performed as well as the control group on math standardized exams and significantly better on one of the science standardized exams. Further analysis showed that ethnic and gender achievement gaps on the standardized assessments were maintained when students attended the PBL school. Similarly, students that attended the PBL school as likely to graduate high school. Comparing the PBL school with a more affluent school that also teaches all courses through PBL showed that graduates from the PBL school of focus in this research were significantly more likely to enroll in 2-year institutions of higher education and just as likely to enroll in 4-year and private institutions in Texas as the more affluent school. Finding that attendance at MNTH does not harm students’ standardized test performance or graduation rates could imply that being taught through PBL does not enhance high school and college outcomes. It could also imply that students taught at the PBL school, MNTH, are not experiencing authentic PBL, or conversely that students attending the comparison school, MHS, are receiving instruction through project-based methods as well. Lastly, the standardized assessments used to measure achievement may not be sensitive to some higher order skill development that may occur when taught through inquiry-based methods. Future research plans are to create new achievement measures that will capture more robust learning than traditional standardized tests. Using these instruments, further analysis of difference in students’ performance when they are taught through inquiry methods will be conducted.Item Survey of new science teacher preparation(2015-08) Piehl, Clayton Garrett; Empson, Susan B.; Riegle-Crumb, CatherineTo investigate how well prepared teachers feel to implement inquiry-based science practices in secondary science classrooms, a phenomenological interview was developed and administered to 6 current secondary science teachers with less than 5 years of experience in the classroom. The interview questioned the participants about the science teaching practices they saw as important in their classroom, how well prepared they felt to implement those practices, and what experiences helped them feel prepared. The interview data were then coded using a constant comparison approach and trends across and within cases were identified. It was found that, teachers felt best prepared to teach secondary science if they had exposure to general teaching skills and specialized routines, comfort with their content, the opportunity for applicable experience in the classroom, and the support of experienced educators during their pre-service training program and first years of teaching. These factors can take different forms in certification programs and the importance of each may vary between individuals, but these four elements were present in each case and were the driving force behind teachers' perceptions of their preparedness.Item The synergy between scientists and experienced educators : an examination of dialogues for professional development opportunities within a team of university instructors who prepare pre-service secondary STEM teachers at an RU/VH research university(2011-05) Buckley, Deanna H.; Barufaldi, James P.; Marshall, Jill A.; Marder, Michael; Brown, Keffrelyn; Walker, MaryProfessional development is an essential component to maintaining quality teaching in mathematics and science (Monk, 1994; Milken, 2000; Loucks-Horsley et al, 2003). University mathematics and science faculty have been subject to criticism regarding professional development and teaching practices (CSMEE, 2000; NRC, 1999; NSES, 1996). Undergraduate students in secondary pre-service Science, Technology, Engineering, and Mathematics (STEM) teacher training programs adopt the models that they have experienced as learners in the university setting (NRC, 1999). This qualitative case study followed a team of three research faculty, one lecturer, one master teacher, and two graduate teaching assistants who team taught an upper level inquiry- based science research methods science course in a STEM teacher preparation program in the College of Natural Sciences at a large public Midwestern research university. Course instructor dialogue between members was recorded, transcribed and triangulated with teaching sequences, course materials, and student interaction during two semesters. The study detailed how faculty members’ and graduate teaching assistants’ content knowledge, pedagogical content knowledge, attitudes and beliefs about teaching and learning were confronted, challenged, and transformed using interdependent disquisition via regular weekly meetings and team teaching practices. Examples of actual dialogue and meeting characteristics are presented compared and discussed against best practices in science education. Four themes emerged from the data: (1) students’ inquiries drive the conversation, (2) confrontations sort out what works from what doesn’t, (3) leadership seems to contribute to learning opportunities for the team and (4) humor indicates the divergent creative abilities of the members of the team and engaging in humorous episodes facilitates learning between team members. Students were directly connected to team members’ developmental processes. This analysis suggests that measurable professional development opportunities exist in team meetings for science faculty and graduate teaching assistants when team teaching inquiry based undergraduate science courses.Item The teaching of astrobiology to develop competent thinking skills in non-science major college students(2012-08) Oliveira, Carlos Fernando Carvalhido; Barufaldi, James P.; Carmona, Lupita; Berland, Leema; Kormendy, John; Hoffman, David; Ferreira, Paulo J.We live in a scientific society. Science is all around us. We take scientific principles for granted every time we use technology, such as a car, a computer, or a cell phone. Paradoxically, the scientific literacy of the population is minimal at best. Having a basic knowledge of scientific principles is no longer a luxury but, in today's complex world, a necessity. To increase the scientific literacy of non-science majors, an astrobiology course was developed at the Center for Science and Mathematics Education at The University of Texas at Austin. The course subscribes to an educational philosophy that promotes the significance of teaching science to non-science majors, endorses the importance of multidisciplinary content knowledge, supports the teaching of the nature of science in an implicitly mode, advances the discussion of socio-scientific issues, and includes competent thinking-based teaching strategies using the dynamic discipline of astrobiology. The thesis reviews the problems in scientific literacy, outlines the characteristics of this innovative course, proposes a novel standard - competent thinking - to evaluate scientific literacy and analyzes the results of this course in terms of competent thinking. Data collected provided evidence of an increase of competent thinking skills among the students, especially in terms of self-reflection. Both the first and the second pilot study showed strong evidence that students transitioned from naive to competent thinking arguments. The main study demonstrated that students greatly improve their self-reflecting skills. The final study confirmed improvement in terms of self-reflecting skills, and showed that students gradually improve their arguments based on logic, reason, sophistication, and evidences. Therefore, the results show that this innovative astrobiology course is an effective tool for enhancing competent thinking skills among non-science major students.Item Understanding the nature of scientific language : how four college students view evolution(2011-08) Tran, Ha Vy; Stroup, Walter M.; Lustig, Abigail; Petrosino, AnthonyDespite the wide-spread acceptance of evolution within the science community, much of the public still holds reservations about evolution as a valid scientific explanation. This is due in part to questions regarding the very nature of a theory, which has been cited by many researchers as an obstacle to accepting evolution. The specific use of semi-structured interviews and research into how students view other nature of science terminology (fact, hypothesis, and law) in relation to theory may provide further insight into how use of the terms can frame attitudes towards evolution. This study qualitatively describes how four college-aged students (science, philosophy, education, and business) interpret basic science terminology and compare scientific explanations in their assessment of evolution. While discussing the terms, students were encouraged to raise other issues that aided them in the construction of their epistemological beliefs about science. The aim was to provide interviewees with the opportunity to speak openly about what they understood regarding nature of science and evolution rather than presuming a shared coherence in the use of the terms. The semi-structured interview format revealed students’ conceptions (or misconceptions) of the nature of science, relative degrees of certainty for the terms, and underlying biases. The results suggest the specific use of interviews can provide a credible and informative account of how students use basic science terminology. A mixed use of the terms can still lead to a favorable disposition towards evolution when students possess a positive attitude towards science, acknowledge the tentative nature of science as a strength rather than a limitation, and practice reflective reasoning. Conclusions made in the study also suggest that an explicit discussion about fact, theory, law, and hypothesis in the science classroom may actually play less of a critical role than previously thought in opening the door to learning content of which many people consider to be controversial. More concentration should be placed on how knowledge is generated and how to reflectively approach a scientific problem.