eric.ed.gov har udgivet: Karabatsos and Walker (2011) introduced a new Bayesian nonparametric (BNP) regression model. Through analyses of real and simulated data, they showed that the BNP regression model outperforms other parametric and nonparametric regression models of common use, in terms of predictive accuracy of the outcome (dependent) variable. The other, outperformed, regression models include random-effects/hierarchical linear and generalized linear models, when the random effects were assumed to be normally-distributed (Laird & Ware, 1982; Breslow & Clayton 1993), and when the random effects were more generally modeled by a nonparametric, Dirichlet process (DP) mixture prior (Kleinman & Ibrahim, 1998a,1998b). The authors argue that the new Bayesian nonparametric (BNP) regression model provides a novel, richer, and more valid approach to causal inference, which allows the researcher to investigate how treatments causally… Continue Reading →
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eric.ed.gov har udgivet: The combined goals of recruiting and retaining effective teachers are often difficult to realize due to fluctuating student enrollments and class-size targets, teaching-load norms or requirements, and budgetary and resource constraints. While schools and districts market and recruit bright new teachers to the field, they too, struggle to maintain enticing career development standards that would retain the most effective teachers in the district. With the high turnover in schools, student achievement suffers. Teacher attrition has grown by 50% over the past fifteen years. The national teacher turnover rate has risen to 16.8%. In urban schools, it is over 20% and, in some schools and districts, the teacher dropout rate is actually higher than the student dropout rate. School districts fall into a chronic cycle of hiring and… Continue Reading →
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eric.ed.gov har udgivet: District and state education leaders frequently use screening assessments to identify students who are at risk of performing poorly on end-of-year achievement tests. This study examines the use of a universal screening assessment of reading skills for early identification of students at risk of low achievement on nationally normed tests of reading and math and provides support for the interpretation of screening scores to inform instruction. Several members of the Regional Educational Laboratory Southeast Improving Literacy Alliance already use a reading screening assessment–the Florida Center for Reading Research Reading Assessment (FRA)–for all students in grades 3-8 to identify students who may be at risk of poor end-of-year reading outcomes. To gain more information to drive instruction without students having to spend more time taking tests, these alliance… Continue Reading →
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eric.ed.gov har udgivet: There are different perspectives in the literature on the examination of visual images used in course books. In this study, illustrations from the visuals used in geometry in the lower learning area of school mathematics were examined and summarized first by researchers and then by teachers and students. For many students, the mathematics coursebook is the first material they encounter in understanding the course content and conveying the mathematics culture. In this study, the illustrations related to the concept of Angle used in mathematics coursebook, two books published abroad, two books published in Turkey, for 5th-grade students were analyzed. The type of research is Document Analysis and the illustrations were examined in qualitative and quantitative terms. In this way, the study aimed to analyze the contribution of… Continue Reading →
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