<p> Improving science, technology, engineering, and mathematics (STEM) education has become a national priority and the call to modernize secondary science has been heard. A Physics First (PF) program with the curriculum sequence of physics, chemistry, and biology (PCB) driven by inquiry- and project-based learning offers a viable alternative to the traditional curricular sequence (BCP) and methods of teaching, but requires more empirical evidence. This study determined impact of a PF program (PF-PCB) on math achievement (SAT math scores) after the first two cohorts of students completed the PF-PCB program at Matteo Ricci High School (MRHS) and provided more quantitative data to inform the PF debate and advance secondary science education. Statistical analysis (ANCOVA) determined the influence of covariates and revealed that PF-PCB program had a significant (p &lt; .05) impact on SAT math scores in the second cohort at MRHS. Statistically adjusted, the SAT math means for PF students were 21.4 points higher than their non-PF counterparts when controlling for prior math achievement (HSTP math), socioeconomic status (SES), and ethnicity/race. </p>

<p>The purpose of this study was to expand on the current research pertaining to women in science, technology, engineering, and mathematics (STEM) majors, better understand the experiences of undergraduate women in the sciences, identify barriers to female persistence in their intended STEM majors, and understand the impact of the STEM co-educational Living Learning Community (LLC) model on female persistence. This study employed a mixed-methods approach that was grounded in standpoint methodology. The qualitative data were collected through focus groups and one-on-one interviews with the female participants and was analyzed through a critical feminist lens utilizing standpoint methodology and coded utilizing inductive analysis. The quantitative data were collected and analyzed utilizing a simple statistical analysis of key academic variables indicative of student success: cumulative high school GPAs, SAT scores, first year cumulative GPAs, freshman persistence patterns in the intended major, and freshman retention patterns at the university. The findings of this study illustrated that the co-educational LLC model created an inclusive academic and social environment that positively impacted the female participants' experiences and persistence in STEM. The findings also found the inclusion of men in the community aided in the demystification of male superiority in the sciences for the female participants. This study also highlighted the significance of social identity in the decision making process to join a science LLC. </p>

<p> Although a large part the Physics Education Research (PER) literature investigates students' conceptual understanding in physics, these investigations focus on qualitative, conceptual reasoning. Even in modeling expert problem solving, attention to conceptual understanding means a focus on initial qualitative analysis of the problem; the equations are typically conceived of as tools for "plug-and-chug" calculations. In this dissertation, I explore the ways that undergraduate physics students make conceptual sense <i>of physics equations</i> and the factors that support this type of reasoning through three separate studies.</p><p> In the first study, I investigate how students' can understand physics equations intuitively through use of a particular class of cognitive elements, <i> symbolic forms</i> (Sherin, 2001). Additionally, I show how students leverage this intuitive, conceptual meaning of equations in problem solving. By doing so, these students avoid algorithmic manipulations, instead using a heuristic approach that leverages the equation in a conceptual argument. </p><p> The second study asks the question why some students use symbolic forms and others don't. Although it is possible that students simply lack the knowledge required, I argue that this is not the only explanation. Rather, symbolic forms use is connected to particular <i>epistemological stances,</i> in-the-moment views on what kinds of knowledge and reasoning are appropriate in physics. Specifically, stances that value <i>coherence</i> between formal, mathematical knowledge and intuitive, conceptual knowledge are likely to support symbolic forms use. Through the case study of one student, I argue that both reasoning with equations and epistemological stances are dynamic, and that shifts in epistemological stance can produce shifts in whether symbolic forms are used to reason with equations. </p><p> The third study expands the focus to what influences how students reason with equations across disciplinary problem contexts. In seeking to understand differences in how the same student reasons on two similar problems in calculus and physics, I show two factors, beyond the content or structure of the problems, that can help explain why reasoning on these two problems would be so different. This contributes to an understanding of what can support or impede transfer of content knowledge across disciplinary boundaries.</p>

<p> In my dissertation, I set out to explore the following research question on bridging: <i>How does ownership evolve as learners engage in a guided inquiry-based science learning environment focused on design and technology usage?</i> My dissertation explores a case study of four learners involved in an afterschool program called Kitchen Chemistry (KC). KC is a nonformal learning environment in which learners engage in scientific practices within the context of cooking. Learners engage in inquiry practices through the development of their own scientific food investigations. In my study I examined how four focal learners come to develop a sense of ownership of science learning as they each develop their own personal food investigations. Using Wenger's (1998) framework of identity formation in communities of practice (imagination, engagement, and alignment), my study shows that a learner's identity and social dynamics from home, school, and informal learning shape and fashion what he or she chooses to own, how ownership is expressed, and how that ownership can both support and hinder a learner's science learning.</p>

<p> The United States must provide quality science, technology, engineering, and math (STEM) education in order to maintain a leading role in the global economy. Numerous initiatives have been established across the United States that promote and encourage STEM education within the middle school curriculum. Integrating active learning pedagogy into instructors' lesson plans will prepare the students to think critically - a necessary skill for the twenty first century. </p><p> This study integrated a three-week long Near Space Balloon project into six eighth grade Earth Science classes from Valley Middle School in Grand Forks, North Dakota. It was hypothesized that after the students designed, constructed, launched, and analyzed their payload experiments, they would have an increased affinity for high school science and math classes. </p><p> A pre- and post-survey was distributed to the students (n=124), before and after the project to analyze how effective this engineering and space mission was regarding high school STEM interests. The surveys were statistically analyzed, comparing means by the Student's t-Test, specifically the Welch-Satterthwaite test. Female students displayed a 57.1% increase in math and a 63.6% increase in science; male students displayed a 46.6% increase in science and 0% increase in math. Most Likert-scale survey questions experienced no statistically significant change, supporting the null hypothesis. The only survey question that supported the hypothesis was, "I Think Engineers Work Alone," which experienced a 0.24% decrease in student understanding. </p><p> The results suggest that integrating a three-week long Near Space Balloon project into middle school curricula will not directly influence the students' excitement to pursue STEM subjects and careers. An extensive, yearlong ballooning mission is recommended so that it can be integrated with multiple core subjects. Using such an innovative pedagogy method as with this balloon launch will help students master the scientific process and experience real team collaboration, as they did in this successful mission.</p>

<p> Today, one third of all college students are considered educationally "mobile," which means they will change institutions during their undergraduate careers. The concept of educational mobility challenges the traditional idea of students moving through an educational pipeline in a linear fashion, and recognizes that many of today's students, including those in STEM fields (Science, Technology, Engineering, Mathematics), will have multiple transition points. </p><p> The purpose of this qualitative study was to examine the transitional experiences of educationally mobile students moving into and through the STEM disciplines at a public university. Students who move from one educational environment to another undergo a significant transition process, and understanding this process for individual students and the institution's role in supporting transition has implications for educational policy. Grounded in the conceptual framework guided by Schlossberg's Transition Theory, and Swail, Redd, and Perna's Geometric Model for Student Persistence and Achievement, this study explores the following research question: How do students who are educationally mobile experience academic, social, and institutional support while transitioning into and through STEM disciplines at a four-year public university?</p><p> Eighteen science and mathematics majors participated in this study, all of whom attended at least one institution of higher education prior to their current attendance at Mountain View University, a four-year comprehensive Hispanic Serving Institution (HSI) in Southern California. Participants were interviewed utilizing a semi-structured interview protocol and completed a demographic questionnaire as well. Trustworthiness measures included member checking and peer debriefing.</p><p> The findings of this study show that educationally mobile students are savvy agents of their education, and make personal and professional sacrifices in their pursuit of a STEM degree. They want to connect to like-minded individuals on campus, and make efforts to seek help. Findings also show that institutional agents play an important role in helping educationally mobile students navigate institutional obstacles in the transition process. Recommendations include increased dialogue about articulation and the transfer processes among institutions, engaging in more consistent advising practices (both at the community college and the university), enabling purposeful social interactions during the transition process, and researching disaggregated populations of educationally mobile students.</p>

<p> This research investigates why typical strategies for promoting health, prolonging life, and preventing disease do not work in many communities. I use the liver fluke infection endemic in Khon Kaen, Thailand to explore the middle ground between Western science and Eastern culture. Prior work on the <i>O.viverrini</i> infection in Khon Kaen, Thailand has focused almost exclusively on developing effective medical treatment for the liver fluke infection. This dissertation employs a case study designed to explore the conditions that created and perpetuate the problem in the first place. In concrete terms, I analyze how the worldviews of local villagers shape their attitudes toward life (and death), which in turn determine if they engage in the high-risk behavior &ndash; eating undercooked fish &ndash; that makes them vulnerable to the infection. My research focuses on these people in-situ over a three-month period, and includes data from participant-observation, interviews, and video-recordings. This work seeks to illuminate how people&rsquo;s thinking and reasoning skills, and personal/cultural identities affect their abilities to learn and act on new health concepts. This potentially provides a window into future educational strategies in a complex world.</p>

<p> The primary purpose of the study was to examine secondary data from the Cooperative Institutional Research Program (CIRP) Freshman and College Senior Surveys to investigate factors shaping degree aspirations for African American female undergraduates partaking in science, technology, engineering, and mathematics (STEM) majors. Hierarchical multiple regression was used to analyze the data and identify relationships between independent variables in relation to the dependent variable. The findings of the study reveal four key variables that were predictive of degree completion for African American females in STEM. Father's education, SAT composite, highest degree planned, and self-perception were positive predictors for females; while independent variable overall sense of community among students remained a negative predictor. Lastly implications for education and recommendations for future research were discussed.</p>

<p>Game-based learning has become a topic of interest in education, especially within the science education community. Although some evidence supporting the effectiveness of digital games for science learning is emerging, the results overall have been largely inconclusive. In order to further advance research on game-based learning, the purpose of this study was to apply an interdisciplinary approach using the cognitive-affective integrated framework, the information-processing model of selective attention (Broadbent, 1958; Lachter et al., 2004), and the dual-process theories of cognition (Kahneman, 2011; Svahn, 2009), to construct a comprehensive view of the mental processes of visual attention during gameplay in relation to the positive affective state of Flow experience. This study utilized a mixed methods design, using a concurrent embedded strategy QUAN/qual (Creswell, 2008) to collect and analyze both quantitative and qualitative data. Thirty-one high-school students (<i>N</i>=31) in the mid-Atlantic region of the United States, between ages 14 and 17, played the Serious Educational Game (SEG) called Neuromatrix. Self-report surveys and an eye tracking method were used to collect quantitative data for statistical analysis. A gaze duration sequence diagram (Raschke, Chen, &amp; Ertl, 2012) was adopted for data visualization and qualitative scanpath analysis. Two Flow scales (FSS-2 and eGameFlow) were used to explore the differences in psychometric properties between the generic and context-specific Flow measures. The results showed a negative linear relationship between visual attention and Flow experience (<i>p</i> &lt; .001). Three visual attention variables were identified and served as the indicators of Flow and perceived science learning in an SEG environment: (a) low fixation counts indicated students&rsquo; focused attention and immersion in an SEG; (b) short total visit duration represented the efficiency of selective visual attention and may serve as an indicator of Flow experience during gameplay; and (c) total fixation duration illustrated the extent to which students looked at specific learning materials that could possibly pass through the selective filter into conscious attention and thus, lead to learning. The interplay between affective and cognitive processes during gameplay played a key role in students&rsquo; deep engagement and had an impact on their positive science learning in an SEG. An interactive effect of total fixation duration and Flow on perceived science learning was found (<i>p</i> &lt; .001, <i> p</i>&eta;² = .324), implying that a well-designed SEG that aligns gameplay and learning objectives may promote synergy between engagement and learning. Moreover, two individual differences factors, science interest and self-efficacy for computer use (<i>p</i> &lt; .01) &ndash; that predicted Flow were identified by a stepwise regression analysis; these factors were shown to influence the attentional processes and cognitive processes of gameplay. The evidence of a positive relationship between science interest and Flow in an SEG may encourage teachers and parents to take an active role in instilling students&rsquo; science interest in their early years, and to support students&rsquo; ongoing development of science interest through exposure to various formal and informal learning contexts. </p>

<p> In this study, the focus was on determining leadership strategies that promote teacher empowerment among urban middle school science teachers. The purpose of the paper was to determine if leadership strategies are related to teacher empowerment. The emphasis was on various forms of leadership and the empowerment of teachers in context in restructuring the democratic structure. An effective leadership in science education entails empowering others, especially science teachers. In this regard, no published studies had examined this perspective on empowering teachers and school leadership. Therefore, this study determined if a relationship exists between leadership strategy actions and teacher empowerment. The significance of the study is to determine a relationship between leadership strategies and teacher empowerment as a positive approach toward developing successful schools. Empowerment is essential for implementing serious improvements. Empowering others in schools must form a major component of an effective principal&rsquo;s agenda. It is becoming clearer in research literature that complex changes in education sometimes require active initiation. For this study, a quantitative methodology was used. Primary data enabled the research questions to be answered. The reliability and validity of the research were ensured. The results of this study showed that 40% of the administrators establish program policies with teachers, and 53% of teachers make decisions about new programs in schools. Furthermore, the findings, their implications, and recommendations are discussed. </p>