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71.
Econometric studies suggest that student achievement may be improved if high-performing teachers are substituted for low-performing teachers. Drawing upon a recent study linking teacher performance on licensure exams with gains in student achievement, an analysis was conducted to determine the cost-effectiveness of requiring teacher applicants to meet a minimum 1000 SAT test score requirement, while raising teacher salaries by 45 percent in order to maintain an adequate pool of candidates. Results indicate that the cost-effectiveness of this approach to raising teacher quality is substantially lower than the cost-effectiveness of a competing approach for raising student achievement, involving the implementation of systems that provide formative assessment feedback to students and teachers regarding student performance in math and reading. The implementation of formative assessment instead of less cost-effective approaches would help to achieve the important goal of raising math and reading achievement while using fewer resources. The savings in resources may then be used to achieve other important educational goals—those that are not well-addressed through formative assessment. 相似文献
72.
I-Fang Cheng Sheng-Chuan Chiang Cheng-Che Chung Trai-Ming Yeh Hsien-Chang Chang 《Biomicrofluidics》2014,8(6)
We present an electrokinetics-based microfluidic platform that is capable of on-chip manipulating, mixing, and separating microparticles through adjusting the interrelated magnitudes of dielectrophoresis and AC electroosmosis. Hybrid electrokinetic phenomenon is generated from an electric field-induced micro-ripple structure made of ultraviolet-curable glue. Size-dependent particle separation and selective removal over the ripple structure is demonstrated successfully. Varying the waveform from sine-wave to square-wave allows generating a fluid convection at specific positions to mix the antibody-functionalized beads and antigen. Potential application in the bead-based immunoassay was also demonstrated for immuno-reaction and subsequently separating the bead-bead aggregate and non-binding beads on-chip. 相似文献
73.
Yi‐Fen Yeh Ying‐Shao Hsu Hsin‐Kai Wu Fu‐Kwun Hwang Tzu‐Chiang Lin 《British journal of educational technology : journal of the Council for Educational Technology》2014,45(4):707-722
Technological pedagogical content knowledge TPACK refers to the knowledge set that teachers currently use to further improve the quality of their teaching and assist their students in learning. Several TPACK models have been proposed, either for discussing TPACK's possible composition or its practical applications. Considering that teachers' practical experiences should also be critical to the development of those teachers' knowledge, this study invited a research panel (six researchers) and an expert panel (54 science‐related educators) to propose and validate the framework of TPACK‐practical. After two rounds of anonymous communications that followed Delphi survey techniques, a total of eight dimensions of TPACK‐practical and corresponding indicators were identified and rated as having high levels of importance. Among these knowledge dimensions, the knowledge of direct information and communication technology uses for enhancing teachers' professionalism and students' conceptual comprehension was rated with a high level of importance. Also, disciplinary differences were found to exist between the different groups of experts. Biology teachers showed significantly higher ratings across all knowledge dimensions, whereas physics teachers' ratings were comparatively low. Such findings suggest that the structure and content of subject matter shapes not only the way they teach with technology but also the thinking logics they build longitudinally from their learning experiences. 相似文献
74.
Christine J. Yeh Noah E. Borrero Patsy Tito Lealaisalanoa Setu Petaia 《The Urban Review》2014,46(2):147-168
Through a critical cultural assets model, the authors use the methodological practices of collaboration, community site visits, document analysis, and interviews with cultural insiders to explore schools’ continued rejection of academic belonging for people from “othered” communities. They explore the case of Samoan youth—a marginalized cultural group—to contest the shared belief that school-based citizenry is an educational impossibility. Interview data with Samoan elders is analyzed using Consensual Qualitative Research methods (Hill et al. in Couns Psychol 24(4):517–572, 1997). They present themes of cultural capacities and academic disconnection to imagine a school context for the integration of cultural assets for “othered” youth (Kliewer and Biklen in Teach Coll Rec 109(12):2579–2600, 2007; Kliewer et al. American Educ Res Assoc J 3(2):163–192, 2006). 相似文献
75.
Although emerging consensus exists that practice-based approaches to teacher preparation assist in closing the distance between university coursework and fieldwork experiences and in assuring that future teachers learn to implement innovative research-based instructional strategies, little empirical research has investigated teacher learning from this approach. This study examines the impact of a video- and practice-based course on prospective teachers’ mathematics classroom practices and analysis of their own teaching. Two groups of elementary prospective teachers participated in the study—one attended the course and one did not. Findings reveal that the course assisted participants in making student thinking visible and in pursuing it further during instruction and in conducting evidence-based analyses of their own teaching. Conclusions discuss the importance of teaching these skills systematically during teacher preparation. 相似文献