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tandfonline.com – What drives global science? The four competing narratives

tandfonline.com har udgivet en rapport under søgningen “Teacher Education Mathematics”: ABSTRACT ABSTRACT Since 1990 there has been remarkable growth and diversification of worldwide capacity and output in science, and a distinctive global science system has emerged, primarily grounded in research universities, fostered by Internet-mediated communication and publication in English, cross-border authorship and researcher mobility. While global science overlaps with and is affected by national science systems, it is constituted by pan-national knowledge flows and collegial collaboration and has partial autonomy. Four different interpretive frameworks (narratives) have evolved to explain global science: science as an expanding cross-border network; science as an arms race between competing nations; science as a global market of competing ‘World-Class Universities’; and science as a centre-periphery hierarchy in which emerging countries are permanently constrained by Euro-American dominance.… Continue Reading

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tandfonline.com – Value-Added and Student Growth Percentile Models: What Drives Differences in Estimated Classroom Effects?

tandfonline.com har udgivet en rapport under søgningen “Teacher Education Mathematics”: ABSTRACT Formulae display:?Mathematical formulae have been encoded as MathML and are displayed in this HTML version using MathJax in order to improve their display. Uncheck the box to turn MathJax off. This feature requires Javascript. Click on a formula to zoom. ABSTRACT This study shows value-added models (VAM) and student growth percentile (SGP) models fundamentally disagree regarding estimated teacher effectiveness when the classroom distribution of test scores conditional on prior achievement is skewed (i.e., when a teacher serves a disproportionate number of high- or low-growth students). While conceptually similar, the two models differ in estimation method which can lead to sizable differences in estimated teacher effects. Moreover, the magnitude of conditional skewness needed to drive VAM and SGP models apart… Continue Reading