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This paper reflects the experience of the authors working in the field of humanitarian education during the last two decades. Important changes have been witnessed since the Central American crises of the seventies, the refugee focus of the eighties and the new UN vision of the complex emergency crisis of the nineties resulting from the post Cold War scenarios of humanitarian calamity.  相似文献   
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The influence of the physical structure of polyurethane matrix as a support in a solid state culture in tannase production and gallic acid accumulation by Aspergillus niger Aa-20 was evaluated. Three different polyurethane matrices were used as the support: continuous, semi-discontinuous and discontinuous. The highest tannase production at 2479.59 U/L during the first 12 h of culture was obtained using the discontinuous matrix. The gallic acid was accumulated at 7.64 g/L at the discontinuous matrix. The results show that the discontinuous matrix of polyurethane is better for tannase production and gallic acid accumulation in a solid state culture bioprocess than the continuous and semi-discontinuous matrices. Project supported by the Agricultural, Livestock and Fishing Department (SAGARPA, No. 12385) and the National Forest Commission (CONAFOR, No. 2004-C01-13), and the Council of Science and Technology, Mexico  相似文献   
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Environmental education researchers have called for a greater analysis of ‘learning’ in environmental education in relation to contemporary theories and explanatory frameworks of learning. Situated learning, as a prominent example, is a sociocultural theory that contends that learning is a social process that occurs as individuals participate in ‘communities of practice’. This study aims to enhance our understanding of the usefulness and applicability of the communities of practice framework to the analysis of learning in environmental education, focusing on the learning in after‐school environmental education programs for Hispanic youth. Results suggest that the framework can be applied to identify some environmental education programs as communities of practice, characterized by the development of joint enterprise, mutual engagement, and shared repertoire. The framework was also found to be useful in identifying and describing learning as bringing about changes in identity formation as a result of participation in the programs. Finally, we suggest that such programs, due to their free‐choice nature and multiple opportunities for participation, also offer suitable contexts for further research regarding the relevance of sociocultural theories of learning to environmental education practice.  相似文献   
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European Journal of Psychology of Education - The main goal of this study was to analyze the contribution of predictors of both domain-general (working memory, processing speed, and receptive...  相似文献   
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This qualitative study focuses on capturing students' understanding two visualizations often utilized by learning analytics-based educational technologies: bar graphs, and line graphs. It is framed by Achievement Goal Theory—a prominent theory of students' academic motivation—and utilizes interviews (n = 60) to investigate how students at risk of college failure interpret visualizations of their potential academic achievement. Findings suggest that visualizations only containing information about students themselves (i.e., self-focused affordances) evoked statements centered on mastering material. Visualizations containing information about students and a class average (i.e., comparative information), on the other hand, evoked responses that disheartened students and/or made them feel accountable to do better. Findings from this study suggest the following guidelines for designing visualizations for learning analytics-based educational technologies: (1) Never assume that more information is better; (2) anticipate and mitigate against potential misinterpretations—or harmful alternative interpretations—of visualizations; and (3) always suggest a way for students to improve. These guidelines help mitigate against potential unintended consequences to motivation introduced by visualizations used in learning analytics-based educational technologies. (Keywords: motivation, visualizations, learning analytics, Achievement Goal Theory, college students, educational technologies)  相似文献   
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We are still designing educational experiences for the average student, and have room to improve. Learning analytics provides a way forward. This commentary describes how learning analytics-based applications are well positioned to meaningfully personalize the learning experience in diverse ways. In so doing, learning analytics has the potential to contribute to more equitable and socially just educational outcomes for students who might otherwise be seen through the lens of the average student. Utilizing big data, good design, and the input of the stakeholders, learning analytics techniques aim to develop applications for the sole purpose of reducing the classroom size to 1. Over time, these digital innovations will enable us to do away with a model of education that teaches toward the non-existent average student, replacing it with one that is more socially just—one that addresses the individual needs of every student.  相似文献   
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Many English language learners (ELLs) experience difficulties with basic English reading due in part to low language proficiency. The authors examined the relationship between English language proficiency and growth during reading interventions for ELLs. A total of 201 second- and third-grade students with a variety of home languages participated. The students were identified as needing a targeted intervention, because scores on the fall oral reading fluency screening measure fell below the benchmark criterion. Thus, all participating students received reading interventions approximately four times each week throughout the school year. Results indicated that those students identified in the lowest English proficiency stage on the Assessing Comprehension and Communication in English State-to-State (ACCESS) made the highest growth as indicated in the spring benchmark assessment, and the ACCESS score added negligible variance beyond baseline reading skills. Implications for practice and research are discussed.  相似文献   
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