Browsing by Subject "scaffolding"
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Item Investigating One Science Teacher?s Inquiry Unit Through an Integrated Analysis: The Scientific Practices Analysis (SPA)-Map and the Mathematics and Science Classroom Observation Profile System (M-SCOPS)(2012-10-19) Yoo, DawoonSince the 1950s, inquiry has been considered an effective strategy to promote students? science learning. However, the use of inquiry in contemporary science classrooms is minimal, despite its long history and wide recognition elsewhere. Besides, inquiry is commonly confused with discovery learning, which needs minimal level of teacher supervision. The lack of thorough description of how inquiry works in diverse classroom settings is known to be a critical problem. To analyze the complex and dynamic nature of inquiry practices, a comprehensive tool is needed to capture its essence. In this dissertation, I studied inquiry lessons conducted by one high school science teacher of 9th grade students. The inquiry sequence lasted for 10 weeks. Using the Scientific Practices Analysis (SPA)-map and the Mathematics and Science Classroom Observation Profile System (M-SCOPS), elements of inquiry were analyzed from multiple perspectives. The SPA-map analysis, developed as a part of this dissertation, revealed the types of scientific practices in which students were involved. The results from the M-SCOPS provide thorough descriptions of complex inquiry lessons in terms of their content, flow, instructional scaffolding and representational scaffolding. In addition to the detailed descriptions of daily inquiry practices occurring in a dynamic classroom environment, the flow of the lessons in a sequence was analyzed with particular focus on students? participation in scientific practices. The findings revealed the overall increase of student-directed instructional scaffolding within the inquiry sequence, while no particular pattern was found in representational scaffolding. Depending on the level of cognitive complexity imposed on students, the lessons showed different association patterns between the level of scaffolding and scientific practices. The findings imply that teachers need to provide scaffolding in alignment with learning goals to achieve students? scientific proficiency.Item Scaffolding in Technology-Enhanced Science Education(2011-08-08) Wu, Hui-LingThis dissertation focuses on the effectiveness of scaffolding in technology-enhanced science learning environments, and specifically the relative merits of computer- and teacher-based scaffolding in science inquiry. Scaffolding is an instructional support that helps learners solve problems, carry out tasks, or achieve goals that they are unable to accomplish on their own. Although support such as scaffolding is necessary when students engage in complex learning environments, many issues must be resolved before educators can effectively implement scaffolding in instruction. To achieve this, this dissertation includes two studies: a systematic literature review and an experimental study. The two studies attempted to reveal some important issues which are not widely recognized in the existing literature. The primary problem confronting the educator is how to determine which of the numerous kinds of scaffolding will allow them to educate students most effectively. The scaffolding forms that researchers create are often confusing, overlapping, or contradictory. In response to this, the first study critically analyzed the ways that researchers have defined and applied scaffolding, and provided suggestions for future scaffolding design and research. Moreover, studies tend to focus only on computer-based scaffolding rather than examining ways to integrate it with teacher-based instruction. Although researchers generally recognize that teacher-based support is important, research in this area is limited. The second study of this dissertation employed a quasi-experimental design with four experimental conditions, each of which include a type of computer-based procedural scaffolding (continuous vs. faded) paired with a type of teacher-based metacognitive scaffolding (early vs. late). Each class was assigned to use one of the four conditions. The findings indicated that students receiving continuous computer-based procedural and early teacher-based metacognitive scaffolding performed statistically better at learning scientific inquiry skills than other treatment groups. Students using faded computer-based procedural and early teacher-based metacognitive scaffolding showed the worst performance. However, among the four groups there existed no statistically significant difference in terms of the effect on students? ability to learn science knowledge. Moreover, teacher-based metacognitive scaffolding did not have a significant impact on either science content knowledge or scientific inquiry skills.Item Scaffolding middle school students' content knowledge and ill-structured problem solving in a problem-based hypermedia learning environment(2009-05-15) Bulu, Saniye TugbaThis study focused on two areas under the overarching theme of the effects of domain-general and domain-specific scaffolds with different levels of support, continuous or faded. First, the study investigated the effects of scaffolds on learning of scientific content and problem-solving outcomes. Second, the study examined whether students? prior knowledge and meta cognitive skills predict their success in problem solving across different scaffolding conditions. A total of nineteen classes were randomly assigned to one of the four scaffolding conditions: domain-general continuous (DG-C), domain-general faded (DG-F), domain specific continuous (DS-C), and domain-specific faded (DS-F). Each class had access to different worksheets depending on the scaffolding condition they had been assigned. All students engaged in four problem-solving activities for thirteen class periods. Students? scores on a multiple-choice pretest, post test, inventory of meta cognitive self-regulation, and four recommendation forms were analyzed. Results of the study revealed that students? content knowledge in all conditions significantly increased over the thirteen class periods. However, the continuous domain specific condition outperformed the other conditions on the post test. Although domain general scaffolds were not as effective as domain-specific scaffolds on learning of scientific content and problem representation, they helped students develop solutions, make strong justifications, and monitor their learning. Unlike domain-specific scaffolds, domain-general scaffolds helped students transfer problem-solving skills even when they were faded. In terms of individual differences, results indicated that while students with lower prior knowledge and lower meta cognitive skills benefited from the domain general continuous condition, students with lower regulation of cognition benefited from the domain-general faded condition. Moreover, while students with lower prior knowledge, lower knowledge of cognition, and lower problem representation benefited from the domain-specific continuous condition, students with lower problem representation benefited from the domain-specific faded condition. In contrast, results of the study suggested that scaffolds did not substantially benefit the students with higher prior knowledge and higher meta cognitive skills. Several suggestions are discussed for making further improvements in the design of scaffolds in order to facilitate ill-structured problem solving in hypermedia learning environments.