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This study employed a case-study approach to reveal how an ability to think with mental models contributes to differences
in students’ understanding of molecular geometry and polarity. We were interested in characterizing features and levels of
sophistication regarding first-year university chemistry learners’ mental modeling behaviors while the learners were solving
problems associated with spatial information. To serve this purpose, we conducted case studies on nine students who were sampled
from high-scoring, moderate-scoring, and low-scoring students. Our findings point to five characteristics of mental modeling
ability that distinguish students in the high-, moderate-, and low-ability groups from one another. Although the levels of
mental modeling abilities have been described in categories (high, moderate, and low), they can be thought of as a continuum
with the low-ability group reflecting students who have very limited ability to generate and use mental models whereas students
in the high-ability group not only construct and use mental models as a thinking tool, but also analyze the problems to be
solved, evaluate their mental models, and oversee entire mental modeling processes. Cross-case comparisons for students with
different levels of mental modeling ability indicate that experiences of generating and manipulating a mental model based
on imposed propositions are crucial for a learner’s efforts to incorporate content knowledge with visual-spatial thinking
skills. This paper summarizes potential factors that undermine learners’ comprehension of molecular geometry and polarity
and that influence mastery of this mental modeling ability. 相似文献
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Meredith Park Rogers Sandra Abell John Lannin Chia-Yu Wang Kusalin Musikul David Barker Shannon Dingman 《International Journal of Science and Mathematics Education》2007,5(3):507-532
This study compares the views of teachers and professional development facilitators about effective professional development
(PD). We analyzed interviews with 72 teacher participants and 23 PD facilitators involved in nine science and mathematics
PD projects. The teachers' themes for characterizing effective PD included classroom application, teacher as learner, and
teacher networking. Similarly, the PD facilitators discussed effective PD as having classroom application and experiences
for teachers as learners. In addition, PD facilitators shared the need to develop collegial relationships with teachers and
improve teacher knowledge. These views correspond to some of the standards and recommendations described in policy and research
documents on effective PD. Criteria of effective PD in these documents that the participants did not mention included: (1)
challenging teachers' content and pedagogical content knowledge with transformative learning experiences, (2) encouraging
teacher leadership for sustained support, and (3) focusing on student learning by instructing teachers on how to use student
data to inform their teaching practice. Our findings have implications for designing PD that reflects the criteria of standards-based
reform. 相似文献
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Wu Chao-Jung Liu Chia-Yu Yang Chung-Hsuan Jian Yu-Cin 《European Journal of Psychology of Education - EJPE》2021,36(1):91-108
European Journal of Psychology of Education - Despite decades of research on the close link between eye movements and human cognitive processes, the exact nature of the link between eye movements... 相似文献
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Wen-Xin Zhang Chia-Yu Wang Yu-Ting Ho 《International Journal of Science Education》2013,35(3):529-553
This study explores the effects of metacognitive and cognitive prompting on the scientific inquiry practices of students with various levels of initial metacognition. Two junior high school classes participated in this study. One class, the experimental group (n?=?26), which received an inquiry-based curriculum with a combination of cognitive and metacognitive prompts, was compared to the other class, the comparison group (n?=?25), which received only cognitive prompts in the same curriculum. Data sources included a test of inquiry practices, a questionnaire of metacognition, and worksheets. The results showed that the mixed cognitive and metacognitive prompts had significant impacts on the students’ inquiry practices, especially their planning and analyzing abilities. Furthermore, the mixed prompts appeared to have a differential effect on those students with lower level metacognition, who showed significant improvement in their inquiry abilities. A combination of cognitive and metacognitive prompts during an inquiry cycle was found to promote students’ inquiry practices. 相似文献
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Hsu Ying-Shao Yen Miao-Hsuan Chang Wen-Hua Wang Chia-Yu Chen Sufen 《International Journal of Science and Mathematics Education》2014,12(1):1-23
In this study, we investigated the impact of teaming school-based instructional coaches with science or mathematics middle school teachers to build a community of practice around inquiry instruction. This professional development model began with a 2-week summer institute and continued with four follow-up sessions during the academic school year for the teacher and instructional coach participants. The teachers’ participation in this professional development program with (1) content instruction through inquiry lessons, (2) practice teaching to middle school students, and (3) coach-led reflection improved their understanding of inquiry-based practices and the quality of their classroom inquiry implementation. Professional development experiences that prepare teachers and coaches simultaneously in inquiry and content may help build a shared language for reform and accelerate inquiry instructional changes. 相似文献
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Using femtosecond laser to fabricate highly precise interior three-dimensional microstructures in polymeric flow chip 总被引：1，自引：0，他引：1
This paper reports using femtosecond laser marker to fabricate the three-dimensional interior microstructures in one closed flow channel of plastic substrate. Strip-like slots in the dimensions of 800 μm×400 μm×65 μm were ablated with pulse Ti:sapphire laser at 800 nm (pulse duration of ～120 fs with 1 kHz repetition rate) on acrylic slide. After ablation, defocused beams were used to finish the surface of microstructures. Having finally polished with sonication, the laser fabricated structures are highly precise with the arithmetic roughness of 1.5 and 4.5 nm. Fabricating such highly precise microstructures cannot be accomplished with nanosecond laser marking or other mechanical drilling methods. In addition, since laser ablation can directly engrave interior microstructures in one closed chip, glue smearing problems to damage molded microstructures possibly to occur during the chip sealing procedures can be avoided too. 相似文献
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Kai-Yu Tang Chia-Yu Wang Hsin-Yi Chang Sufen Chen Hao-Chang Lo Chin-Chung Tsai 《International Journal of Science and Mathematics Education》2016,14(2):249-262
The issues of metacognitive scaffolding in science education (MSiSE) have become increasingly popular and important. Differing from previous content reviews, this study proposes a series of quantitative computer-based analyses by integrating document co-citation analysis, social network analysis, and exploratory factor analysis to explore the intellectual structure of the MSiSE literature (i.e. the relationships within and between subfields of MSiSE). Co-citation refers to any two articles that are jointly referenced in other articles. After the computation of co-citation analysis, 27 articles that have been co-cited at least once by follow-up studies as references were identified as the final set of core articles. The whole co-citation profile of 27 cores with the 434 links was then visualized in a network through social network analysis, representing an overview for the intellectual structure of core MSiSE studies. The most cross-referenced underpinnings in the network focused on adaptive scaffolding for self-regulated learning to enhance students’ conceptual understanding and on younger students’ metacognition in online science inquiry learning environments. Furthermore, two emerging topics in the network were identified through an exploratory factor analysis as “non-technological metacognitive scaffolding media,” and “behavior patterns & task analysis in technology-infused environments.” Overall, the study provides an innovative review method of scholarly communication in the MSiSE literature. 相似文献
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Chia-Yu Wang 《International Journal of Science Education》2013,35(2):237-271
This study investigated the effects of scaffolds as cognitive prompts and as metacognitive evaluation on seventh-grade students' growth of content knowledge and construction of scientific explanations in five inquiry-based biology activities. Students' scores on multiple-choice pretest and posttest and worksheets for five inquiry-based activities were analyzed. The results show that the students' content knowledge in all conditions significantly increased from the pretest to posttest. Incorporating cognitive prompts with the explanation scaffolds better facilitated knowledge integration and resulted in greater learning gains of content knowledge and better quality evidence and reasoning. The metacognitive evaluation instruction improved all explanation components, especially claims and reasoning. This metacognitive approach also significantly reduced students' over- or underestimation during peer-evaluation by refining their internal standards for the quality of scientific explanations. The ability to accurately evaluate the quality of explanations was strongly associated with better performance on explanation construction. The cognitive prompts and metacognitive evaluation instruction address different aspects of the challenges faced by the students, and show different effects on the enhancement of content knowledge and the quality of scientific explanations. Future directions and suggestions are provided for improving the design of the scaffolds to facilitate the construction of scientific explanations. 相似文献
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