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The framework for this paper is a recently developed theory of abstraction in context. The paper reports on data collected from one student working on tasks concerned with absolute value functions. It examines the relationship between mathematical constructions and abstractions. It argues that an abstraction is a consolidated construction that can be used to create new constructions. Newly formed constructions are fragile entities. In the course of consolidating a construction this student creates connections between the new construction and already established mathematical knowledge and develops a language to describe and guide mathematical actions related to the construction. The resulting abstraction is a more resilient form of the construction and the student is able to justify his assertions. The paper also examines issues in designing tasks to consolidate a construction. 相似文献
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Fatih Yazıcı Tercan Yıldırım 《Paedagogica Historica: International Journal of the History of Education》2018,54(4):433-446
Nation-states needed various ideological apparatuses when they wanted to eliminate traditional loyalties to the pre-modern era and establish a new superordinate identity. As frequently emphasised in conceptual discussions, two elements among these ideological apparatuses come to the fore: historiography and education. While social values that create a national identity have been constructed by historiography continuously from the past to the present, it aims at spreading such values through education. History education at the intersection of these two concepts has occupied a privileged place in the nation-building process. The most concrete examples of this phenomenon are the developments experienced in the context of history teaching in Turkey from 1923 to 1938, also known as the early republican period. The present study, using history textbooks, analyses changes in history teaching and expectations of it between 1923 and 1938, which were the most active years of the nationalisation period in Turkey. The findings of this study indicate that the historiography of the early republican period adopted an anthropology-based understanding in line with the conjuncture between the two world wars and that, in accordance with this understanding, a national identity with ethnic, religious, and political dimensions was intended to be promulgated through history teaching. 相似文献
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Julie A. Edmunds Fatih Unlu Elizabeth Glennie Lawrence Bernstein Lily Fesler Jane Furey 《Journal of research on educational effectiveness》2017,10(2):297-325
Developed in response to concerns that too few students were enrolling and succeeding in postsecondary education, early college high schools are small schools that blur the line between high school and college. This article presents results from a longitudinal experimental study comparing outcomes for students accepted to an early college through a lottery process with outcomes for students who were not accepted through the lottery and enrolled in high school elsewhere. Results show that treatment students attained significantly more college credits while in high school, and graduated from high school, enrolled in postsecondary education, and received postsecondary credentials at higher rates. Results for subgroups are included. 相似文献
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Erdal Binboğa Serdar Tok Fatih Catikkas Senol Guven Senol Dane 《Journal of sports sciences》2013,31(9):982-988
Abstract We investigated the effect of verbal encouragement on maximal voluntary contraction (MVC) level of the triceps surae muscle group. Our secondary focus was to examine whether the effect of verbal encouragement on MVC level varies as a result of conscientiousness. While the participants performed plantar flexion, MVCs of the triceps surae muscle group were measured using rectified and smoothed surface electromyography (rsEMG) during the absence and presence of verbal encouragement. Participants completed questions from the Five Factor Personality Inventory concerning conscientiousness and were divided into high- and low-conscientiousness groups according to a median split. The sample included 30 female and 53 male elite athletes. In the entire cohort, there was no significant difference in MVCs with and without verbal encouragement. When the sample was partitioned by conscientiousness scores, verbal encouragement led to a significant increase in MVC in the low-conscientiousness group, whereas verbal encouragement led to a non-significant decrease in MVC in the high-conscientiousness group. Percentage change in MVC across experimental conditions was significantly different between the groups, with a 9.72% increase during verbal encouragement of the low-conscientiousness group, and a 2.47% decrease during verbal encouragement of the high-conscientiousness group. 相似文献
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Arslan-Ari Ismahan Crooks Steven M. Ari Fatih 《Journal of Science Education and Technology》2020,29(5):666-676
Journal of Science Education and Technology - This study explored the effects of prior knowledge and cueing on the learning (retention, transfer, and matching) and mental effort of learners who... 相似文献
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Kristin E. Porter Sean F. Reardon Fatih Unlu Howard S. Bloom Joseph R. Cimpian 《Journal of research on educational effectiveness》2017,10(1):138-167
A valuable extension of the single-rating regression discontinuity design (RDD) is a multiple-rating RDD (MRRDD). To date, four main methods have been used to estimate average treatment effects at the multiple treatment frontiers of an MRRDD: the “surface” method, the “frontier” method, the “binding-score” method, and the “fuzzy instrumental variables” method. This article uses a series of simulations to evaluate the relative performance of each of these four methods under a variety of different data-generating models. Focusing on a two-rating RDD (2RRDD), we compare the methods in terms of their bias, precision, and mean squared error when implemented as they most likely would be in practice—using optimal bandwidth selection. We also apply the lessons learned from the simulations to a real-world example that uses data from a study of an English learner reclassification policy. Overall, this article makes valuable contributions to the literature on MRRDDs in that it makes concrete recommendations for choosing among MRRDD estimation methods, for implementing any chosen method using local linear regression, and for providing accurate statistical inferences. 相似文献
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The purpose of this paper is to present the design and techniques used by the Educational Technology program at the University of South Carolina to prepare scholarly practitioners with action research methods in an online doctoral program. With an emphasis on students’ local contexts, we will describe the design of experiences and our lessons learned. This paper could aid higher education faculty, administrators, and educators that train scholarly practitioners who engage in scholarship to improve practice. 相似文献
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