eric.ed.gov har udgivet: In a study about pre-service secondary mathematics teachers’ (PSMTs) understanding about the nature of theorems in geometry, the researcher noticed that it was challenging for the PSMTs to visualize and draw counterexamples to disprove the given mathematical statements. Meanwhile, the use of the dragging feature of dynamic geometry environments (DGEs), such as the Geometer’s Sketchpad and GeoGebra, in teaching and learning proof and reasoning has been widely discussed and become an ongoing research trend. In this paper, the researcher and her colleague will present a research design aimed at investigating PSMTs’ conceptions of counterexamples in geometric reasoning when using the dragging feature of DGEs. Expected results of the study are potentially beneficial to pre-service/in-service secondary math teachers as well as teacher educators. Link til kilde
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tandfonline.com har udgivet en rapport under søgningen “Teacher Education Mathematics”: Abstract Abstract This study explores what opportunities for critical literacy work that can be distinguished in the practices of an emerging digitalised classroom and how teachers and students make use of these. Observations were conducted over the course of one semester in three subjects in a Swedish class of 13–14-year olds using individual tablets. The findings presented as thick descriptions suggest that different kinds of opportunities to develop critical literacy evolve in various activities and digital technologies become a resource in students’ work. However, these opportunities mainly occur in peer interactions outside the visible control of the teacher and never develop into further critical reflections. The study concludes that a deliberate emphasis on critical literacy work in the design of… Continue Reading →
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tandfonline.com har udgivet en rapport under søgningen “Teacher Education Mathematics”: Abstract The position statement on value-added models published by the American Statistical Association (ASA) suggested guidelines and issues to consider when using value-added models as a component of a teacher evaluation system. One suggestion offered is that value-added results should be accompanied by measures of precision. It is important, however, to go beyond simply reporting measures of precision alongside point estimates, but instead to formally include measures of precision into the value-added models and teacher classification systems. This practice will lead to improved inferences and reduced misclassification rates. Therefore, the aim of this article is to offer two suggested approaches for including measures of precision into the value-added model process. The first suggestion is to account for measurement error in… Continue Reading →
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tandfonline.com har udgivet en rapport under søgningen “Teacher Education Mathematics”: Abstract Abstract The 2016 Guidelines for Assessment and Instruction in Statistics Education (GAISE) College Report emphasized six recommendations to teach introductory courses in statistics. Among them: use of real data with context and purpose. Many educators have created databases consisting of multiple datasets for use in class; sometimes making hundreds of datasets available. Yet “the context and purpose” component of the data may remain elusive if just a generic database is made available. We describe the use of open data in introductory courses. Countries and cities continue to share data through open data portals. Hence, educators can find regional data that engage their students more effectively. We present excerpts from case studies that show the application of statistical methods to… Continue Reading →
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