Persistently high attrition rates from STEM majors present a stubborn challenge for researchers, administrators, and faculty alike. To approach this problem, my dissertation examined the socialization processes by which students develop a sense of belonging to both their institution and their discipline. Previously identified as an important factor in students' persistence and overall satisfaction with their undergraduate experience, belonging is a critical piece of the retention puzzle. However, not every student experiences or develops belonging in the same way. This dissertation applied the theoretical lens of socialization to deepen the understanding of how social interactions help or hinder students' belonging to their university and chosen major alike. My dissertation work was grounded in the synthesis of two theoretical frameworks: Conrad et al.'s (2006) model of socialization and Strayhorn's (2018e) conceptualization of sense of belonging. The study took the form of an embedded case study of two similar disciplinary contexts within a large public land-grant Research 1 institution, with four students from each context for a total of eight participants. By leveraging four years of interview data from each participant, supported by institutional documentation, I addressed the question: In what ways does a student's socialization experience influence, if at all, their sense of belonging to both their chosen discipline and their university? Data analysis included qualitative coding, trajectory mapping, and thematic analysis. Trajectories were produced for each participant before expanding the analysis to examine patterns across and between the contexts. My findings addressed the mechanisms of socialization at the undergraduate level and how they evolved over time. The primary outcome of my work was a set of three distinct socialization trajectories, named the Anchored, who built strong socializing relationships early and maintained them throughout their undergraduate years; Independents, who neither sought nor wanted such relationships; and Wanderers, whose socializing relationships tended to be short-lived and inconsistent, although desired. Fourteen unique groups of socializing agents were identified, along with five common drivers for intentionally engaging with specific agents: personal and academic support, research and industry aspirations, and finding a path. Pre-college socialization experiences were salient for developing anticipatory belonging, as students who were exposed to their discipline or institution prior to arriving as students had an easier time becoming integrated to their communities. Once students arrived, their socialization trajectories tended to shape their feelings of belonging to the institution, with close ties forming for the Anchored, appreciation for general support among the Independents, and a mix of happiness and frustration for the Wanderers. By contrast, disciplinary belonging was more reliant on the individual participant's goals and interests. Disciplinary differences between the two contexts were identified but were limited in scope and generally linked to the career outcomes students associated with their chosen major rather than their experiences in the major. Finally, my research revealed that a strong sense of belonging in one domain of undergraduate life could be sufficient for a student to persist to degree completion despite weak or absent feelings of belonging in other areas. / Doctor of Philosophy / For decades, students have been leaving STEM majors at alarmingly high rates despite the efforts of researchers, administrators, and faculty. To approach this problem, my dissertation examined how social interactions and relationships can help students feel like they belong in their chosen major and university. Previous research identified such feelings of belonging as an important factor in helping students persist to the completion of their degrees, and my work added onto this body of work by specifically examining the role of students' social connections. My dissertation utilized data from eight total students. Four of the students were chemical engineering students, with the remaining four from chemistry and biochemistry, together called the "chemical sciences." The data for this work included four years of interview data supported by institutional documents. Such documents provided information like curricular requirements, demographic and population information, and course information, which helped provide background for the students' interviews. Leveraging these data, I addressed the aforementioned interaction of students' social interactions and their feelings of belonging on campus and in their major. My data analysis was based around the creation of trajectories that would capture the evolution of a student's experiences over the course of their undergraduate career. Once trajectories were generated for each student, I was then able to look across the trajectories and identify patterns between and within them. The primary finding of my dissertation work was the emergence of three distinct patterns of how students' social interactions evolved over time, labeled the Anchored, who built strong and consistent networks that they maintained over two or more years; the Independents, who neither sought nor wanted such relationships; and the Wanderers, who had relationships and interactions that were often short-lived or inconsistent, but wanted more. Fourteen unique groups with whom students interacted were identified, along with the respective impacts said groups could have on students' feelings of belonging. Additionally, five drivers for seeking out interaction with these groups were identified: personal and academic support, research and industry aspirations, and finding a path. The experiences students had with their university or major prior to enrolling were found to be important for shaping the way students perceived their future, and those with greater exposure to their institution or discipline had an easier time seeing themselves fitting in and finding a place for themselves on campus once they enrolled. Once students arrived, their trajectory of interaction tended to shape how they felt about their institution, with close ties forming for the Anchored, appreciation for general support among the Independents, and a mix of satisfaction and frustration for the Wanderers. By contrast, belonging within the discipline was more reliant on the individual participant's goals and interests. Disciplinary differences between the two contexts were identified but were limited generally linked to the career outcomes students associated with their chosen major rather than their experiences in the major. Finally, my work revealed that when students felt like they belonged in one area of their undergraduate life, those feelings could support lacking feelings in other areas, helping them to persist to graduation.

Globalization and technology have placed a recognizable pressure on both employers and educational institutions. Entry-level employees must be adaptive, innovative, collaborative, and have strong problem-solving and communication skills. To prepare students for the future workforce, schools must revisit existing practices and find new ways to foster innovation as the gap between the new skills students need verses what is being taught in public schools continues to grow (Bybee et al, 2006; Wagner, 2012). One way to increase students' interest and skills in STEM education is by incorporating makerspaces into schools. Makerspaces are physical spaces where people have opportunities to build and construct objects based on their own personal interests. Makerspaces foster the innovative ideas and skills students need upon graduation. This qualitative case study investigates why educational leaders decided to launch a makerspace lab and how school leaders established a model makerspace lab at an elementary school. The purpose of this study was to document and describe the change process connected with the implementation of the makerspace lab, how leaders navigated various obstacles, perceptions of the change process, and lessons learned from educators. The findings show that school leaders experienced a novel concept after visiting an extraordinary model makerspace program which demonstrated a unique approach to developing the innovative capacity of young learners. These experiences created a transformational moment in school leaders that motivated them to be change agents and launch their own makerspace lab. School leaders developed community partnerships with an engineering university, a Fortune 500 company, an education community foundation, and a large school district to make this work possible. Together, these educational and business collaborators created a model elementary makerspace model that is one of the first of its kind on the east coast and currently services students from other schools in the region. The findings further discuss the importance of community partnerships, inviting other schools to participate, having a model program to emulate, having the right people, and how a school initiative became a district opportunity. / Doctor of Education / Globalization and technology have pressured both employers and educational institutions to change. Entry-level employees must be adaptive, innovative, collaborative, and have strong problem-solving and communication skills. To prepare students for the future workforce, schools must revisit existing practices and find new ways to foster innovation as the gap between the new skills students need verses what is being taught in public schools continues to grow (Bybee et al, 2006; Wagner, 2012). One way to increase students’ interest and skills in STEM education is by incorporating makerspaces into schools. Makerspaces are physical spaces where people have opportunities to build and construct objects based on their own personal interests. Makerspaces foster the innovative ideas and skills students need upon graduation. This qualitative case study investigates why educational leaders decided to launch a makerspace lab and how school leaders established a model makerspace lab at an elementary school. The purpose of this study was to document and describe the change process connected with the implementation of the makerspace lab, how leaders navigated various obstacles, perceptions of the change process, and lessons learned from educators. The findings show that school leaders experienced a novel concept after visiting an extraordinary model makerspace program which demonstrated a unique approach to developing the innovative capacity of young learners. These experiences created a transformational moment in school leaders that motivated them to be change agents and launch their own makerspace lab. School leaders developed community partnerships with an engineering university, a Fortune 500 company, an education community foundation, and a large school district to make this work possible. Together, these educational and business leaders created a model elementary makerspace model that is one of the first of its kind on the east coast and currently services students from other schools in the region. The findings further discuss the importance of community partnerships, inviting other schools to participate, having a model program to emulate, having the right people, and how a school initiative became a district opportunity.

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In an effort to meet the demands of industry within society, STEM (Science, Technology, Engineering, and Mathematics) education has been a major push for the United States Government resulting in public school system reform. As STEM education begins to become integrated across disciplines and special areas of public schools, and the population of inclusive classrooms containing Students with Disabilities continues to rise, a very important question must be fully investigated and answered. We must ask: Do first year Secondary STEM Education and Special Education teachers have the instructional preparedness to effectively teach all populations of students within their classrooms? And do STEM education and Special Education teachers have the appropriate content credentials to effectively support the diverse needs of students and curriculum in an inclusive STEM education class? This dissertation consists of two research studies that examine Special Education and STEM Education teachers preparedness (coursework and professional development) and content credentials to educate Students with Disabilities within an inclusive STEM Education classroom. This study will be utilizing a secondary analysis of the 2011- 2012 School and Staffing Survey Teacher Questionnaire (SASS TQ) datasets to conduct national analysis of how Special Education and STEM Education teachers degrees, state-level certification areas, and professional development participation reflect potential indicators of preparedness to educate in an inclusive STEM education classroom. The first study focuses on well-known approaches for the instruction of STEM Education and Special Education. This study will utilize differentiated instruction, behavior management, and data to drive instruction as best classroom approaches to instruction to determine their identifiable differences in instructional preparedness among first year STEM educators and first year Special Education teachers. The second study utilizes the 2011-2012 SASS TQ datasets to analyze Special Educators credentials to teach STEM compared to STEM educators credentials to teach Special Education. This study will analyze and compare credentials and backgrounds of STEM educators and Special Educators in search of indicators for preparedness for Inclusive STEM education. / Ph. D.

This study examined the effects of computational labs in Business Calculus classes used at a single, private institution on student outcomes of conceptual understanding of calculus and attitudes towards mathematics. The first manuscript addresses the changes in conceptual understanding through multiple-method research design, a quantitative survey given pre and post study and qualitative student comments, found no significant gains in conceptual knowledge as measured by a concept inventory, however, student comments revealed valuable knowledge demonstrated through reflection on and articulation of how specific calculus concepts could be used in real world applications. The second manuscript presents results to the effects on attitudes toward mathematics, studied through multiple-method research design, using a quantitative survey given at two intervals, pre and post, and analysis of student comments, which showed that students that participated in the labs had a smaller decline in attitude, although not statistically significant, than students that did not complete the labs and the labs were most impactful on students that had previously taken calculus; student comments overwhelmingly demonstrate that students felt and appreciated that the labs allowed them to see how calculus could be applied outside the classroom. Overall students felt the labs were beneficial in the development of advantageous habits, taught some a skill they hope to further develop and study, and provided several recommendations for improvement in future implementation. Collectively, this research serves as a foundation for the effectiveness of computational tools employed in general education mathematics courses, which is not currently a widespread practice. / Doctor of Philosophy / Students from a variety of majors often leave their introductory calculus courses without seeing the connections and utility it may have to their discipline and may find it uninspiring and boring. To address these issues, there is a need for educators to continue to develop and research potentially positive approaches to impacting students' experience with calculus. This study discusses a method of doing so, by studying students' understanding of and attitude toward calculus in a one-semester Business Calculus course using computational labs to introduce students to calculus concepts often in context of a business scenario. No significant gains in conceptual knowledge were found as measured by a concept inventory; however, student comments revealed valuable knowledge demonstrated through articulation of how specific calculus concepts could be used in real world applications. Students that participated in the labs also had a smaller decline in attitude than students that did not complete the labs. Student comments overwhelmingly demonstrate that students felt and appreciated that the labs allowed them to see how calculus could be applied outside the classroom. The labs were most impactful on students that had previously taken calculus. Overall students felt the labs were beneficial in the development of advantageous habits such as persistence, utilizing resources, and precision, introduced them to coding, a skill they hope to further develop and study, and students provided several recommendations for improvement in future implementation. This research provides a foundation for the effectiveness of computational tools used in general education mathematics courses.

Integrated STEM education and Universal Design for Learning (UDL) have been often theorized as compatible. However, there has been little research done to understand how UDL is used in real-world integrated STEM classrooms. Our study aimed to understand how current practicing educators in integrated STEM classrooms combine these teaching methodologies. This was done through a combination of interviews and document analysis of lesson plans, and supplementary information. To evaluate what elements of UDL were used in the documents, researchers developed a UDL codebook based off of the 31 checkpoints in the Center for Applied Special Technology (CAST) UDL guidelines. The goal of the study was to understand how the adoption of UDL could spread across all integrated STEM educators. Therefore, our study viewed the use of UDL in an integrated STEM classroom as an 'innovation' and analyzed our results through Diffusion of Innovation theory. Specifically looking to providing understanding to the 'innovation' through Rogers 5 Attributes of innovations. The study found that all except two UDL checkpoints were proved to be compatible within integrated STEM classrooms, and were categories developed to explain how the participant achieved these checkpoints. The findings also show that not all UDL checkpoints occur at the same frequency. Through Diffusion of Innovation theory, our study showed that Integrated STEM educators believe that UDL is automatically adopted by educators using Integrated STEM teaching methodologies. They expressed problems associated with implementing some UDL checkpoints, and providing overall themes of complexity when implement UDL in an Integrated STEM classroom. / Master of Science in Life Sciences / Integrated STEM education and Universal Design for Learning (UDL) are two teaching methodologies that have been often theorized to be compatible. However, there has been little research done to understand how UDL is used in real-world integrated STEM classrooms. The study aimed to understand how current practicing educators in integrated STEM classrooms combine these teaching methodologies. This was done through a combination of interviews and document analysis of lesson plans, and supplementary information. To evaluate what elements of UDL were used in the documents, researchers developed a UDL codebook based off of the 31 checkpoints in the Center for Applied Special Technology (CAST) UDL guidelines. The goal of the study was to understand how the adoption of UDL could spread across all integrated STEM educators. Therefore, our study viewed the use of UDL in an integrated STEM classroom as an ‘innovation' and analyzed our results through Diffusion of Innovation theory, which conceptualizes an innovation spread through a population. The study found that all except two UDL checkpoints were proved to be compatible within integrated STEM classrooms, and were categories developed to explain how the participant achieved these checkpoints. The findings also show that not all UDL checkpoints occur at the same frequency. Through Diffusion of Innovation theory, our study showed that Integrated STEM educators believe that UDL is automatically adopted by educators using Integrated STEM teaching methodologies, but when discussing the implementation of specific UDL checkpoints themes about the complexity of the innovation emerged.

The Georgia Institute of Technology (Georgia Tech), one of the nations leading engineering schools, has limited institutional history of collaboration with surrounding K-12 schools. K-12 outreach is not a part of Georgia Techs mission, though recent years have seen greater outreach activities. Campus organizations have sponsored tutoring, academic schools have sponsored recruitment fairs and the College of Engineering has established a partnership with a high school. Two offices within Georgia Tech, the Center for the Enhancement of Teaching and Learning (CETL) and the Center for Education Integrating Science, Math and Computers (CEISMC), have been working to expand and deepen Georgia Techs K-12 outreach through a National Science Foundation grant program combining graduate student development and K-12 outreach. Through this program, the Student and Teacher Enhancement Partnership (STEP), CETL and CEISMC seek to build meaningful and lasting relationships between Georgia Tech and local high schools. Given the novelty of mutually rewarding relationships between Georgia Tech and local high schools, this study attempts to account for differences in outcomes of the (STEP) program over its first three years. STEPs Project Officers at Georgia Tech developed dyadic relationships with high school personnel with the same programmatic goals in mind. However, at the end of three years, some of these pairings were more mutually rewarding. A narrative analysis of these relationships is presented through case studies and tested against a literature-based logic model depicting factors likely to lead to successful, inter-organizational partnerships.

Despite efforts to increase female participation in STEM majors, women continue to be an underrepresented population in this domain, impacting the U.S. workforce. Researchers have identified a variety of factors that benefit engineering students without regard to gender (mentoring; student-faculty interactions; co-curricular involvement) but research is limited on how female engineering students foster a sense of belonging to the engineering major helping them persist through to graduation. Negative factors like gender bias or stereotyping are detailed in extant literature. Research needs to identify ways that contribute to female engineering connection and sense of belonging in engineering, not solely focus on the factors that negatively impact female engineering student trajectories. In an effort to address this gap in the literature, interviews with alumnae who graduated from engineering colleges across the U.S. were conducted. Data from this study provides a glimpse into what helped foster successful navigation through engineering majors for alumnae. Expanding current female and STEM literature, participants provide insights on pre-college, college, and on career influences. / text

This dissertation consists of three articles that explore the effect of professional development (PD) on teachers‘ understanding and implementation of Science, Technology, Engineering, and Mathematics (STEM) project based learning (PBL), and the effect of STEM PBL on students‘ mathematics achievement. Teachers in three high schools participated in the research activities. They attended sustained PDs provided by one STEM center based in a Southwestern university, and were required to implement STEM PBLs once every six-weeks for three years (2008 through 2010). The first article employed a mixed-method case study to explore the relation between the quality of the teachers‘ in-class STEM PBL implementations, understanding of the PBL in STEM education, and attendance in the STEM PBL activities. Quantitative findings indicate that attendance in the PD activities was significantly correlated with the quality of the in-class PBL implementation in 2010, yet not in 2011. Moreover, qualitative findings show that the teachers viewed the STEM PBL pedagogy as a means to promote student interest in mathematics, cultivate the interdisciplinary research culture in K-12 classrooms, and help improve students‘ content understanding. The second article investigated the effect of STEM PBL, especially on Hispanic and at-risk students‘ mathematics achievement. The participants were 528 students in the three STEM PBL high schools and 2,688 students in non-STEM PBL schools in the same region. Latent growth modeling was used to analyze the repeated measures across years. STEM PBL instruction positively influenced Hispanic students‘ achievement in mathematics, but not at-risk students. The third study investigated whether participating in STEM PBL activities affected students who had varied performance levels, and to what extent students‘ individual factors influenced their mathematics achievement. The participants were 836 high school students in the three schools. The findings from the hierarchical linear modeling showed that low performing students showed statistically significantly higher growth rates on mathematics scores than high and middle performing students, over the three years. In addition, student‘s ethnicity and economic status were good predictors of academic achievement. This dissertation is the first to reveal the effect of STEM PBL on student academic achievement relating to inservice teacher PD by employing the sophisticated research methodology.