US competitiveness in the 21st century global economy depends on a workforce that is science, technology, engineering and mathematics (STEM) literate, and has knowledge and skills to tackle complex technological problems. In response to the need for a STEM literate workforce equipped with 21st century skills there is a push for K-12 educational reform. STEM literacy is the ability to use content knowledge and skills in science, technology, engineering and math in solving human problems in a collaborative manner (NRC, 2009, Wiggins and McTighe, 2005). Researchers have argued that the integrative STEM education (I-STEM ED) pedagogical approach (with its roots in technology education) promotes active learning through student discovery of using science and mathematics content and practices in novel situations, with active construction of understanding by doing (Cajas, 2001; Wells, 2010, 2016b) Critical thinking and problem solving (CT and PS) skills, collectively identified as 21st century skills by P21 (2005a), involved in solving authentic design problems are not assessed in traditional science and mathematics standardized testing or in Tech-ED classrooms in K-12 grades. Assessments in traditional classrooms, focus on the extent of correctness of the end-result, and rarely, if ever, on the reasoning or procedures leading to the result (Docktor and Heller, 2009; Shavelson, Ruiz-Primo, Li and Ayala, 2003; Steif and Dantzler, 2005). Furthermore, the content knowledge tested is directly related to what has been recently taught in the classroom, and eliminates the need for solvers' demonstration of metacognitive processes involved in CT and PS that require recalling/selecting the discipline specific content knowledge. Within traditional Tech-ED classrooms, students are assessed using competencies defined in the Career and Technical Education curriculum framework which do not focus on solving authentic problems. Herein lies the gap between what is needed for the 21st century worker and what is currently the focus of secondary education. The purpose of this study was to measure the extent to which students immersed in an I-STEM ED program were successful in solving an authentic design-based problem presented to them outside the context of the classroom where the content was learned. In addition, five specific student abilities (SAs) that contribute to authentic problem-solving were identified and a rubric to assess these SAs was developed and validated. A design-no-make challenge (DNMC) was developed and administered to these students. Analysis of their responses showed that students immersed in an integrative STEM education program performed significantly better in designing a solution to the DNMC when compared with a hypothesized mean for students in a traditional classroom. Furthermore, the specific SAs associated with selecting and utilizing the relevant science and math content and practices, and communicating logical reasoning in their design of a solution were found to be strongly correlated to students' successful problem-solving. / Ph. D.

As widespread as Science, Technology, Engineering, and Math (STEM) initiatives and reforms are today in education, a rudimentary problem with these endeavors is being overlooked. In general, education programs and school districts are failing to ensure that elementary teachers who provide children's early academic experiences have the appropriate knowledge of and proclivity toward STEM subjects. This issue is further compounded by the focus centered on mathematics due to accountability requirements leaving very little emphasis on science, and most often, the exclusion of technology and engineering instruction from the curriculum (Blank, 2012; Cunningham, 2009; Lederman and Lederman, 2013; Lewis, Harshbarger, and Dema, 2014; Walker, 2014). At the elementary level, the lack of science instruction and professional development generates a weakness for both pre- and in-service teachers and prompts elevated concerns about teaching science (Goodrum, Cousins, and Kinnear, 1992; Anderson, 2002). Research (Lewis, 1999/2006; Wells, 2014) suggests that one way to address this weakness is through the technological/engineering designed-based approach within the context of integrative STEM education. The purpose of the study was to gain an understanding of change in science instructional content and practice through professional development that educates elementary teachers to implement Technological/Engineering Design Based Learning (T/E DBL) as part of teaching science. The research design was a multiple case study which adhered to a concurrent mixed method approach (Teddlie, and Tashakkori, 2006; Yin, 2003),with four participants who were recruited because of their availability and their grade level teaching assignment that correlated to an analysis of the 2013 science state accountability test, Standards of Learning (Pyle, 2015). Data collected from surveys were analyzed using descriptive and inferential statistics. These data were corroborated with a sweep instrument and assessment rubric analyses, and interview responses to validate the results. Findings from this study revealed that professional development model used in this study was clearly effective in getting elementary teachers to implement T/E DBL. The participants were better able to integrate T/E DBL when planning and designing instructional units and had an improved understanding of the science concepts they were teaching. / Ed. D.

<div>In the United States, there has been an increased emphasis on science, technology, engineering, and mathematics (STEM), and especially engineering, in pre-college settings. There are several potential benefits of this, including: increasing the quantity and diversity of students who pursue STEM careers, improving all students’ technological literacy, and improving student learning in the STEM disciplines. While current standards support the integration of the four STEM disciplines in pre-college classrooms, research still needs to be done to determine which models of STEM integration are effective and how and why they impact student learning. The context of this study is a model of STEM integration called engineering design-based STEM integration. The purpose of this study was to do an in-depth exploration of students’ use of science conceptions during an engineering design-based STEM integration unit, with additional focus on how engineering design, redesign, teamwork, and communication influence students’ use of science conceptions. For this study, the unit was designed to address middle school-level physical science concepts related to heat transfer, including temperature, thermal energy, and processes of heat transfer (i.e., conduction, convection, and radiation).</div><div><br></div><div>An embedded case study design was used to explore students’ science conceptions while they participated in an engineering design STEM integration unit. The case was one student team from a seventh-grade science class, and the students within the team were the embedded sub-units. Data were collected on each day of the unit’s implementation; these data included video of the student team and entire classroom, audio of the student team, observations and field notes, and student artifacts, including their engineering notebooks. Data were analyzed primarily using methods from qualitative content analysis. Themes emerged for the whole team, with emphasis on specific students when appropriate.</div><div><br></div><div>The results show that there were a few key features of engineering (i.e., engineering design, redesign, teamwork, and communication) that influenced students’ use of heat transfer conceptions. During much of the problem scoping stage, which included the science lessons focused on heat transfer, students mostly used scientific conceptions about conduction, convection, and radiation. However, when they needed to think about those three processes of heat transfer together, as well as apply them to the context of the engineering design challenge, the students began to use a larger mix of scientific conceptions and alternative conceptions. Several alternative conceptions emerged when they combined ideas and vocabulary from conduction and radiation to create one set of rules about thermal properties of materials (i.e., did not distinguish between conduction and radiation). Even when they used scientific conceptions, the students sometimes applied the conceptions unscientifically when designing, which led them to create a prototype that performed poorly. However, the student team then learned from the failures of their first design and redesigned, during which they appropriately used mostly scientific conceptions. In other words, the opportunity to learn from failure and redesign was critical to this team’s use of correct conceptions about heat transfer. Two other features of engineering that emerged were teamwork and communication through notebooks. Students on the team learned from each other, but they learned both scientific and alternative conceptions from each other and from their peers on other teams. Engineering notebooks proved to be somewhat helpful to students, since they referred to them a few times when designing, but more importantly they were helpful in revealing students’ conceptions, especially for one student on the team who rarely spoke.</div><div><br></div><div>The findings of this study contribute to future development and implementation of other engineering design-based STEM integration curricula because they show how various features of engineering influenced this student team’s use of science conceptions. In particular, the results demonstrate the importance of giving students the opportunity to learn from failure and redesign, since this process can help students use more scientific conceptions and potentially repair their alternative conceptions. Additionally, it is important for curriculum developers and teachers to think carefully about the transition from problem scoping to solution generation and how to include effective scaffolds for students to help them combine their conceptions from science lessons and apply them correctly when designing. These results also have implications related to heat transfer conceptions, as the student team in this study demonstrated some scientific and alternative conceptions that were already in the literature. Additionally, they used alternative conceptions when they confused concepts from conduction and radiation, which are not in literature about pre-college heat transfer conceptions. These findings suggest that more research should be done to explore the interaction of engineering design and students’ science conceptions, especially heat transfer conceptions.</div>