The purpose of this study was to examine the relationship between learning styles and student performance on a pre and post test, using an online case study, while also documenting their reactions to the case study. The case studies used in this research contained different storylines that showed multiple perspectives of case scenarios, giving students more choices to see what may happen in real school situations. Working with undergraduate students (N = 138) from the College of Education at a southeastern university, the researcher examined how students learned and responded to an online case study relative to their learning styles. Kolb's learning style inventory and a learner feedback survey questionnaire were administered respectively before and after the case study. Scores on Kolb's learning style inventory were used to classify the students' learning style preferences. A paired samples t-test was used to analyze the learners' knowledge test scores before and after the case study. The data revealed that the mean of students' post-test scores was significantly higher than the mean of their pre-test scores. Using descriptive methods, students' responses to the feedback questionnaire were analyzed. There was no difference shown between students with different learning style preferences, their overall reactions to the case study, and their reactions to certain elements (e.g., the content map, the assistants, and the navigation) included in the case study. Overall, most students' reactions to the case study were positive. Open-ended questions in the feedback questionnaire were analyzed and three assertions were generated. Of the optional features included within the case study, eighty two percent of students used the practice quizzes to self-check whether they understood the concepts and content covered in the cases. Students' post-test scores were congruent with their reactions to the online case study (with higher scoring students expressing more positive responses); and students' preferences regarding the use of online cases for study emerged in patterns relative to their career background. The study results showed that case studies can be used effectively in teacher education programs, while many learners (74%) favored using the case study and developed positive reactions through their case study experiences.

This quantitative research, carried out at the military environment at the Defense Language Institute investigated whether learning approaches could predict learners' language proficiency and learners' attitude towards technology-enhanced language learning (TELL). In addition, it also examined whether learners' demographic factors, such as age, educational backgrounds, prior experience in foreign language learning and in TELL as well as their ability to use PC and the World Wide Web could predict the above mentioned language proficiency and attitude. A cluster sampling method was adopted and data was collected in four Chinese departments at the institute. Both the learning approaches inventory ASSIST and the attitudes towards TELL survey were administered to 158 Chinese language learners. 137 valid responses were obtained. All data were input into SPSS for regression and correlation analyses. Conclusions of the study are as follows: 1. The surface and apathetic approach (p<.01) was a significant predictor for both learners' measured language proficiency and their self-perception of academic performance. 2. The strategic approach was a positive predictor for learners' attitudes towards TELL; whereas, surface and apathetic approach was a negative predictor for learners' attitudes towards TELL. 3. None of the learners' demographic variables could not predict either learners' language proficiency or their attitudes towards TELL. Implications for instructional design, curriculum development, teacher education, as well as relevant research issues were discussed.

Major Advisors: Suzanne Martin, Ph.D., Laura Blasi, Ph.D. Universities in the United States of America are faced with numerous challenges concerning quality assurance such as the quest for Continuous Quality Improvement. Implementation of technology has been a priority of many developing institutions of higher education. A large metropolitan institution of higher education has put into practice a technology based, on-line program quality assessment system, for its academic and administrative programs. This dissertation was a study of the changes reported over four years, 2001-2005, within ten initial teacher preparation undergraduate programs at the College of Education at this institution. Using a mixed method approach, this study addressed the following primary questions: 1. Since the system was introduced; a. Has the process of monitoring quality in the academic units changed? b. If changes have occurred in the program plans, how have they been documented and implemented? 2. What are the limitations/benefits of the system, as perceived by its users? This study is a case for its readers to understand the process of quality improvement as practiced in a college of education within a metropolitan university.

Co-chairs: Dr. Donna Baumbach Dr. Gail West Background: Electronic portfolios are increasingly used to make critical decisions about teacher candidates and program accreditation. Adoption rates for portfolios are at nearly 90% for schools, colleges, and departments of education (Salzman, Denner, & Harris, 2002). Over 50% of institutions who rated themselves or were nominated by others as exemplary users of electronic portfolios use web-based database-driven electronic portfolio systems (Strudler & Wetzel, 2005b; Wetzel & Strudler, 2005b). There is a paucity of theory-driven, systematic, rigorous research on electronic portfolios and a need for in-depth, context-aware research on such initiatives. Purpose: To explicate the differential impact of different portfolios systems on preservice teachers. The overarching research question was, "What are the preservice teachers' experiences using tools to create an electronic portfolio?" Setting: The Teachers College at a large university and the Education Department at a small liberal arts college. Participants: Six preservice teachers at each institution served as key participants. Informal interviews with numerous other participants provided additional data. Research Design: Qualitative multi-site case study informed by Engeström's Cultural Historical Activity Theory (CHAT) (Engeström, 1987). Data Collection and Analysis: Document analysis, focus group interviews, individual interviews, thinkaloud work sessions, and lab and classroom observations provided data. Qualitative data analysis was informed by Creswell's "data analysis spiral" and Engeström's CHAT. Findings: Visits at both institutions presented several of the key ideas in the CHAT framework including the networked nature of activity, the portfolio as a boundary activity, contradictions within the portfolio activity, and changes to the portfolio activity system. Additional themes included transition, creativity, reflection, and resources.

This dissertation study was intended to verify whether the positive effects of the roll-over annotation presentation format on reducing cognitive load and enhancing vocabulary and comprehension of 5th-grade children (Morrison, 2004) can be extended to college students' learning from a web-delivered text. In order to answer this research question, relevant constructs, such as cognitive load, learner control and learning, have been examined in this experimental study of 149 undergraduate students in a state university at College of Education. No single effect of annotation presentation format on cognitive load was found, but an interaction effect on cognitive load was revealed between annotation presentation formats and pre-existing knowledge in this study of online education, similar to the interaction effect between annotation presentation formats and learners' reading experience found in traditional textbook learning (Yeung, Jin and Sweller, 1998; Yeung, 1999). Besides, students' computer experience also had a significant impact on their perceived cognitive load. One more key finding from this study was that the embedded annotation presentation format generated the least learner control, significantly different from other annotation presentation formats. In conclusion, an adaptive approach to the design of annotation presentation formats is recommended, for example, individual differences including learners' familiarity with content should be considered along with different annotation presentation formats so as to reduce learners' overall cognitive load. Additionally, learners' computer experience should be examined when hypertext annotations are used. Finally, choices of annotation presentation formats should be well-conceived to balance cognitive load, learning, and learner control.

This study determines the particular components that are considered the best practices to use when implementing an e-Learning curriculum. Technical communicators and instructional designers have numerous development options to choose from. However, practices that work in academe do not always integrate well in a corporate setting, and what works for one corporation may not work for another. There is no singular methodology for developers to apply that enables e-Learning to fit every organization's needs. Research shows that to ensure a successful online learning implementation, a sound project management team must be in place at the beginning of the project planning. This team must be prepared to collaborate with managers and users across an organization and carefully incorporate their suggestions into the curriculum design. Additionally, this team must be experienced not only in making sure that the project is launched on time and within the defined budget, but also in asking pertinent questions about the users, content structure, and design. Implementing an e-Learning site involves more than putting a Web page online for users to view. Developers must know about adult learning styles, must know how to incorporate interactive activities (like games and simulations), and must know how to write content so that it is engaging yet understandable.

In the recent century, a process of urbanization has increased globally. Previously rural or natural land have been converted into impervious surfaces to make way for housing, industries, and roads. This anthropogenic process has resulted in an increased amount of surface runoff from precipitation, so-called stormwater. Stormwater can accumulate a range of pollutants when it flows over the impervious surfaces of our cities. These pollutants can have a negative impact on the lakes and streams that receive the stormwater from the urban environments. To reduce the environmental problems associated with the content of stormwater, various techniques have been developed for stormwater treatment, with the aim of reducing the pollutant load in the runoff before it enters the receiving waterbody. One such technology is stormwater biofiltration, also known as bioretention. Stormwater biofilters were developed in the USA in the early 90's and they utilize the natural water remediation properties of plant-soil systems. They are generally characterized by a vegetated submerged filter bed with an underlying drainage layer. They have shown to be an effective method for stormwater pollutant removal. The treatment processes take place both in the vegetation and in filter material. As th ematerial choices and design of the biofilters can vary, so can its treatment performance. Stormwater biofilters have grown in popularity in the last decades since their development and numerous studies have been conducted to evaluate the systems’ treatment efficiency. However, knowledge gaps still exist regarding their implementation in colder climates and the suitability of different configurations and materials. This study examines the removal performance of total and dissolved heavy metals (Cd (cadmium),Cu (copper), Pb (lead) and Zn (zinc)), phosphorus, nitrogen and total suspended solids (TSS) in three stormwater biofilters in a Swedish climate, located in central Malmö. The current biofilters are designed with different configurations of their filter media and are built with 1) sand-basedfilter material 2) sand-based filter material with a submerged zone and 3) filter media consisting of 50% sand-based material in combination with 50% pumice. The results showed that the treatment capacity of the biofilters with a filter media of only sand (biofilter S) and with sand as well as a submerged zone (biofilter S_SZ) was similar for all pollutants. The reduction of total levels of metals (&gt; 85 %) and TSS (&gt;90 %) was consistently high and similar to levels achieved in previous studies for both temperate and colder climates. The removal of dissolved metals was lower in comparison to the removal of the total metal fractions, but the dissolved fractions were still generally reduced in the effluent. A positive removal of total phosphorus and total nitrogen was overall displayed in the effluent from the two biofilters; however,leaching was shown for the dissolved fractions. For nitrogen (N) species, the concentrations in the runoff were generally below the detection limit for the analysis making it difficult to establish probable removal percentages. For the biofilter S_P, which contained a mix of sand and pumice, the removal capacity was lowerfor all parameters compared to the other designs. Overall, the pollutant removal performances are regarded to be satisfactory for biofilters S andS_SZ and their implementation suitable for the given site. However, further investigations should be performed during warmer seasons, especially regarding the removal of nutrients.

A problem representation is a cognitive structure created by the solver in correspondence to the problem. Sketching representative diagrams in the domain of physics encourages a problem solving strategy that starts from 'envisionment' by which one internally simulates the physical events and predicts outcomes. Research studies also show that sketching representative diagrams improves learner's performance in solving physics problems. The pedagogic benefits of sketching representations on paper make this traditional learning strategy remain pivotal and worthwhile to be preserved and integrated into the current digital learning landscape. In this paper, I describe AR Physics, an Augmented Reality based application that intends to facilitate one's learning of physics concepts about objects' linear motion. It affords the verified physics learning strategy of sketching representative diagrams on paper, and explores the capability of Augmented Reality in enhancing visual conceptions. The application converts the diagrams drawn on paper into virtual representations displayed on a tablet screen. As such learners can create physics simulation based on the diagrams and test their "envisionment" for the diagrams. Users' interaction with AR Physics consists of three steps: 1) sketching a diagram on paper; 2) capturing the sketch with a tablet camera to generate a virtual duplication of the diagram on the tablet screen, and 3) placing a physics object and configuring relevant parameters through the application interface to construct a physics simulation. A user study about the efficiency and usability of AR Physics was performed with 12 college students. The students interacted with the application, and completed three tasks relevant to the learning material. They were given eight questions afterwards to examine their post-learning outcome. The same questions were also given prior to the use of the application in order to compare with the post results. System Usability Scale (SUS) was adopted to assess the application's usability and interviews were conducted to collect subjects' opinions about Augmented Reality in general. The results of the study demonstrate that the application can effectively facilitate subjects' understanding the target physics concepts. The overall satisfaction with the application's usability was disclosed by the SUS score. Finally subjects expressed that they gained a clearer idea about Augmented Reality through the use of the application.

Online learning provides secondary students with the flexibility to meet learning goals at a time, place, and pace that meets their needs. In order to be successful in online courses, students must exhibit strong levels of self-regulated learning (SRL), including time management, goal setting, and resilience. Understanding the SRL behaviors of secondary online students can help course designers, instructors, and administrators design effective learning environments and provide targeted support to help students be successful in online learning environments. This three-manuscript dissertation analyzes the course pacing behaviors of secondary students enrolled in online courses to attain insight on their self-regulated behaviors. As a proxy for understanding online self-regulated behaviors, temporal variables were examined including the average length of an online study session, the amount of time between study sessions, the average number of study session sand the overall number of study sessions for each participant. The first study investigated the relationships between student demographics and temporal behaviors in relation to their effect on the depth of student understanding on the course midterm exam. The second study explores trends in online temporal behaviors, including the consistency and frequency of engagement in the course, and how these behaviors change over time in relation to student demographics. The final article utilizes student demographics and temporal behaviors to study their effect on academic achievement, as measured by their performance on the Advanced Placement exam. Findings from these studies indicate that online pacing behavior is related to student demographics and previous academic experience while also providing insight into how these variables affect achievement. By understanding the temporal behaviors of online secondary students, personalized support can be provided to strengthen student time management and engagement to promote academic achievement.

Computer-based testing (CBT) in education is on the rise; however, researchers question the interchangeability of CBT and pencil-based testing (PBT). Educators and leaders need to consider test mode interchangeability and student assessment preference prior to adopting CBT in K-8 schools. Following the new literacies theory, this mixed methods study examined test mode preference, the effect on achievement, and factors that influenced student preferences. Research questions investigated participants' computer attitudes and use to determine test mode preference, the impact of test mode and test mode preference on achievement, and factors that influence testing preferences. This sequential explanatory within-group design included 2 online surveys and 2 reading tests in CBT and PBT formats. Paired-sample t tests were used to analyze reading test data preferred and nonpreferred test modes and across CBT and PBT test modes. Qualitative themes were generated and coded using an inductive approach, and patterns among data were analyzed. Findings revealed that all participants used technology regularly at home and at school, and most students preferred CBT over PBT. Quantitatively, there were no significant differences in reading achievement between students' preferred and nonpreferred test modes or between CBT and PBT test formats. Qualitative analysis indicated that students who chose PBT as their preferred test mode did so due to their familiarity with the format. Overall, results supported the idea that CBT and PBT were interchangeable. Implications for positive social change include increasing teachers' effective use of testing modes to improve student confidence, which may translate into improved student achievement.