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41.
Teaching about the nature of science (NOS) is seen as a priority for science education in many national contexts. The present paper focuses on one central issue in learning about NOS: understanding the nature and status of scientific theories. A key challenge in teaching about NOS is to persuade students that scientific knowledge is generally robust and reliable, yet also in principle always open to challenge and modification. Theories play a central role, as they are a form of conjectural knowledge that over time may be abandoned, replaced, modified, yet sometimes become well established as current best scientific understanding. The present paper reports on findings from interviews with 13–14 year olds in England where target knowledge presents theories as ‘consistent, comprehensive, coherent and extensively evidenced explanations of aspects of the natural world’. Student thinking reflected a two-tier typology of scientific knowledge in which largely unsupported imaginative ideas (‘theories’) became transformed into fairly definitive knowledge (such as laws) through relatively straightforward testing. These results are considered in relation to research into intellectual development which indicates that effective teaching in this area requires careful scaffolding of student learning, but has potential to contribute to supporting intellectual development across the curriculum.  相似文献   
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Teaching/learning conditions in developing countries   总被引:1,自引:0,他引:1  
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This study was conducted to test whether group identification (importance of the group to the individual) covaried with individual-group similarity on problem behavior; and whether group identification moderated peer group influence on the individual's development of delinquent behavior across a 1-year period. The level of reciprocated nominations within the individual's self-nominated group was controlled for in all analyses. Participants were 190 sixth and seventh graders (during the first year of the study) from the north of Italy. Level of reciprocated nominations within the group, but not identification, was found to covary with individual-group behavioral similarity (group behavior interacted with reciprocity of group nominations in predicting individual behavior). Group identification, but not reciprocated nominations, was found to moderate peer group influence on the individual's change in delinquent behavior, across 1 year. The individual's peer status within the classroom, level of reciprocated nominations, and gender all were related to the individual's level of group identification. Results are discussed in terms of understanding peer group influence on the individual.  相似文献   
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The expulsion of the Muslim minority from Portugal, decreed by King Manuel I in December 1496, has been one of the most overlooked aspects of the end of religious tolerance in the Iberian Peninsula at the close of the Middle Ages. Using unedited documentary sources preserved in the national Portuguese archives, this article focuses on the expulsion of the Muslims from Portugal and seeks to challenge a number of assumptions concerning this unprecedented event. Three major questions concerning this expulsion are examined. What evidence is there that the expulsion of the Muslims did take place? Where did the expelled Muslims seek refuge? What were the causes of this expulsion? This article will endeavour to present a new hypothesis relating to the causes of this expulsion, which radically differs from that advanced by modern historians.  相似文献   
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