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The study compares the levels of response to angle/rotation problems presented on screen with a Logo microworld with the levels of response to similar problems presented on paper. Pairs of children aged from 9 to 11 who had little or no experience of Logo completed the problems in about 40 minutes. Pairs of children completed the problems over a period of eight weeks. The responses, classified using the SOLO taxonomy (Structure of Observed Learning Outcomes), suggested that the effect of the immediate feedback of the screen turtle heading was to inhibit moves to a higher level of response compared to those levels of response reached when responding to paper tests. 相似文献
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Describing students of the African Diaspora: Understanding micro and meso level science learning as gateways to standards based discourse 总被引：1，自引：1，他引：0
Ed Lehner 《Cultural Studies of Science Education》2007,2(2):441-473
In much of the educational literature, researchers make little distinction between African-American students and students
of the African Diaspora who immigrated to the United States. Failing to describe these salient student differences serves
to perpetuate an inaccurate view of African-American school life. In today’s large cities, students of the African Diaspora
are frequently learning science in settings that are devoid of the resources and tools to fully support their success. While
much of the scholarship unites these disparate groups, this article details the distinctive learning culture created when
students from several groups of the African Diaspora learn biology together in a Brooklyn Suspension Center. Specifically
this work explains how one student, Gabriel, functions in a biology class. A self-described black-Panamanian, Gabriel had
tacitly resigned to not learning science, which then, in effect, precluded him from any further associated courses of study
in science, and may have excluded him from the possibility of a science related career. This ethnography follows Gabriel’s
science learning as he engaged in cogenerative dialogue with teachers to create aligned learning and teaching practices. During
the 5 months of this research, Gabriel drew upon his unique lifeworld and the depth of his hybridized cultural identity to
produce limited, but nonetheless important demonstrations of science. Coexistent with his involvement in cogenerative dialogue,
Gabriel helped to construct many classroom practices that supported a dynamic learning environment which produced small yet
concrete examples of standards based biology. This study supports further investigation by the science education community
to consider ways that students’ lifeworld experiences can serve to structure and transform the urban science classroom.
相似文献
| Ed LehnerEmail: |
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The development of services provided by the National Library of Medicine (NLM), which dates back to 1836, is described. MEDLINE, a database of 10-plus million references and abstracts to the world's biomedical literature, was put on the World Wide Web for free searching in 1997 as a system called PubMed, whose use has grown to over 250 million searches per year. PubMed features a variety of links between MEDLINE references and related information – full-text journal articles, DNA sequence data, medical knowledge bases, etc. – at websites within and outside NLM. PubMed is a major component of a larger NLM system, Entrez, which integrates access to a number of genome-related databases with linking features similar to those of PubMed. The newest linked service, which became a reality in February 2000, is PubMed Central, the National Institutes of Health's free repository for primary research reports in all the life sciences. 相似文献
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