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Joan I. Heller Kirsten R. Daehler Nicole Wong Mayumi Shinohara Luke W. Miratrix 《科学教学研究杂志》2012,49(3):333-362
To identify links among professional development, teacher knowledge, practice, and student achievement, researchers have called for study designs that allow causal inferences and that examine relationships among features of interventions and multiple outcomes. In a randomized experiment implemented in six states with over 270 elementary teachers and 7,000 students, this project compared three related but systematically varied teacher interventions—Teaching Cases, Looking at Student Work, and Metacognitive Analysis—along with no‐treatment controls. The three courses contained identical science content components, but differed in the ways they incorporated analysis of learner thinking and of teaching, making it possible to measure effects of these features on teacher and student outcomes. Interventions were delivered by staff developers trained to lead the teacher courses in their regions. Each course improved teachers' and students' scores on selected‐response science tests well beyond those of controls, and effects were maintained a year later. Student achievement also improved significantly for English language learners in both the study year and follow‐up, and treatment effects did not differ based on sex or race/ethnicity. However, only Teaching Cases and Looking at Student Work courses improved the accuracy and completeness of students' written justifications of test answers in the follow‐up, and only Teaching Cases had sustained effects on teachers' written justifications. Thus, the content component in common across the three courses had powerful effects on teachers' and students' ability to choose correct test answers, but their ability to explain why answers were correct only improved when the professional development incorporated analysis of student conceptual understandings and implications for instruction; metacognitive analysis of teachers' own learning did not improve student justifications either year. Findings suggest investing in professional development that integrates content learning with analysis of student learning and teaching rather than advanced content or teacher metacognition alone. © 2012 Wiley Periodicals, Inc. J Res Sci Teach 49: 333–362, 2012 相似文献
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Hongyang Huang Jinying Zhang Yifan Zhang Chengcheng Fu Jialiang Huang Yonghong Cheng Chunming Niu Xinluo Zhao Hisanori Shinohara 《国家科学评论(英文版)》2019,6(4):767
Many different phase structures have been discovered for silver iodides. The β and γ phases were found to be the most common ones at ambient conditions, while the rock-salt phase was found to be stable under pressures between 400 MPa and 11.3 GPa. Recently, the α phase was demonstrated to be stable under ambient conditions when the particle sizes were reduced to below 10 nm. However, no other phase has been reported to be stable for silver iodides under ambient conditions. Rock-salt and helix structures have been found to be stable under ambient conditions in this study. The structures have been characterized by elemental mapping, Raman scattering, and high-resolution transmission electron microscopy. The stabilities of these structures were also confirmed by molecular dynamics and density functional theory. 相似文献
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COLLEGE CHEATING IN JAPAN AND THE UNITED STATES 总被引：2，自引：0，他引：2
Diekhoff George M. Labeff Emily E. Shinohara Kohei Yasukawa Hajime 《Research in higher education》1999,40(3):343-353
This paper reports the results of a survey onacademic dishonesty given to samples of 392 American and276 Japanese college students in 1994 and 1995. Our datarevealed both cross-cultural differences and similarities in cheating behavior andattitudes. Compared to American students, Japanesestudents reported a higher incidence rate of cheating onexams, a greater tendency to neutralize (i.e., justify) cheating, and a greater passivity in theirreactions to the observed cheating of others. Amongcheaters of both nationalities, Japanese students ratedsocial stigma and fear of punishment as less effective in deterring cheating than did Americanstudents. Our data also revealed cross-culturalsimilarities. Among noncheaters of both nationalities,guilt was the most effective deterrent. Among cheatersof both nationalities, fear of punishment was the mosteffective deterrent. And students of both cultures,cheaters and noncheaters alike, viewed social stigma asthe least effective deterrent to cheating. In both cultures, most students react to cheating byignoring it, about one-third react by resenting it, andactive reactions (i.e., reporting the cheating orconfronting the cheater) were seldom reported.Explanations for cross-cultural differences are suggested,and implications of these findings for efforts to reducecheating are discussed. 相似文献
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