Representing student achievements in science

In what follows, we develop a conceptual argument for expanding current visions of performance assessment to include the following three ideals: that performance/assessment addresses the value‐laden decisions about what and whose science is learned and assessed and include multiple worldviews, that performance/assessment in science simultaneously emerges in response to local needs, and that the performance/assessment is a method as well as an ongoing search for method. To make this argument, we draw together ideas raised by critical, feminist and multicultural science educators to describe an inclusive science education, one we refer to as critical science education, to raise questions about the nature and purpose of performance assessment in science education. We are particularly interested in how the science of assessment is challenged and transformed within a critical science education perspective and the conditions needed to create an equitable and inclusive practice of science and science assessment across diversity. We present a case study from a youth‐led community science project in the inner city to help contextualize our argument. © 2001 John Wiley & Sons, Inc. J Res Sci Teach 38: 337–354, 2001     

无边界高等教育及其资格认证

在全球化背景下 ,特别是世贸组织的发展 ,高等教育已越来越被视为一种国际商品和服务贸易中的出口产业。各国积极谋求开拓高等教育的国际市场 ,吸引海外学生 ,在别国开办和接管高校 ,运用信息与传播技术实施远程高等教育 ,从而出现了无边界高等教育。无边界高等教育的发展 ,在较大程度上依赖于教育质量的保障和受教育者的资格认证 ,因而有效发展国际认可的资格认证制度 ,将是无边界高等教育发展的一个重要方面     

Aretaic pedagogy: how we can transform the aesthetics of good teaching

Abstract

The article aims to introduce the epistemology of aretaic pedagogy as a refreshing paradigm of good teaching, situating at its centrality, instead of a knowledge-based perspective, a virtue-based approach to education. Its origins are in Aristotelian virtue ethics, which premise the acquisition of intellectual and ethical virtues as the highest good of the good life. Aretaic pedagogy is therefore constructed on the basis of the theory of virtue development and deliberates teaching as an ethical, virtue-driven practice. Its epistemological framework depends largely on three components: the notion of teaching as a practice, the embodiment of internal goods in teaching/learning and the harnessing of students’ private knowledge. Dialogue, beauty and play are proposed as the main internal goods within the students’ learning, which can act as key sources of their practice of virtues. As concerns a teacher’s pedagogical presence, it is argued from a dual professional prospect: the technological and the ethical. Therefore, a teacher is called to exercise a nexus of epistemic, technical, poetic and ethical virtues.     

Winning the battle and losing the war: Examining the relation between grade retention and dropping out of high school

The aim of this investigation is to provide a comprehensive review of dropout research that examines grade retention within both associative and predictive models. A systematic review of seventeen studies examining dropping out of high school prior to graduation demonstrates that grade retention is one of the most powerful predictors of dropout status. The discussion addresses the discrepancies among the perspectives of many educational professionals regarding the effectiveness of grade retention and deleterious long‐term correlates. The transactional model of development is presented, which emphasizes developmental trajectories over time, in order to facilitate the interpretation of the association between grade retention and school withdrawal. Educational professionals, teachers, researchers, parents, and policymakers considering the efficacy of grade retention are encouraged to consider the implications of these findings. © 2002 Wiley Periodicals, Inc.     

Efficiency of Targeted Multistage Calibration Designs Under Practical Constraints: A Simulation Study

Calibration of an item bank for computer adaptive testing requires substantial resources. In this study, we investigated whether the efficiency of calibration under the Rasch model could be enhanced by improving the match between item difficulty and student ability. We introduced targeted multistage calibration designs, a design type that considers ability‐related background variables and performance for assigning students to suitable items. Furthermore, we investigated whether uncertainty about item difficulty could impair the assembling of efficient designs. The results indicated that targeted multistage calibration designs were more efficient than ordinary targeted designs under optimal conditions. Limited knowledge about item difficulty reduced the efficiency of one of the two investigated targeted multistage calibration designs, whereas targeted designs were more robust.     

Membrane-integrated microfluidic device for high-resolution live cell imaging

The design and fabrication of a membrane-integrated microfluidic cell culture device (five layers,≤500 μm total thickness) developed for high resolution microscopy is reported here. The multi-layer device was constructed to enable membrane separated cell culture for tissue mimetic in vitro model applications and pharmacodynamic evaluation studies. The microdevice was developed via a unique combination of low profile fluidic interconnect design, substrate transfer methodology, and wet silane bonding. To demonstrate the unique high resolution imaging capability of this device, we used oil immersion microscopy to image stained nuclei and mitochondria in primary hepatocytes adhered to the incorporated membrane