Assessing key epistemic features of didactic-mathematical knowledge of prospective teachers: the case of the derivative

In recent years, there has been a growing interest in studying the knowledge that mathematics teachers require in order for their teaching to be effective. However, only a few studies have focused on the design and application of instruments that are capable of exploring different aspects of teachers’ didactic-mathematical knowledge about specific topics. This article reports the results obtained following the application of a questionnaire designed specifically to assess certain key features of prospective, higher secondary-education teachers’ knowledge of the derivative. The questionnaire was constructed using a theoretical model of mathematical knowledge for teaching based on the onto-semiotic approach to mathematical knowledge.     

Curricular change in Turkey: Time,sequentiality, and differential power of actors in establishing a new knowledge path

This paper introduces the knowledge path concept to research on curriculum change. Vis-à-vis existing inquiries into curriculum making, the paper explores the usefulness of the knowledge path concept in an empirical analysis of curriculum change that primary education in Turkey underwent at the turn of the century. Based on the documentary interpretation of expert interviews and other material, the paper enquires into the processes that instigated and enabled the curriculum change and rendered it durable. This concept may contribute to four previously identified research approaches to curriculum change: empirical case studies, ideology-critical and New Institutionalist inquiries, and a focus on organizational politics. It emphasizes the significance of time and sequentiality during change processes and underpins the differentiated power of actors.     

A Review of Solution Chemistry Studies: Insights into Students’ Conceptions

This study has reviewed the last two decades of student conception research in solution chemistry pertaining to aims, methods of exploring students conception, general knowledge claims, students conceptions and difficulties, and conceptual change studies. The aims of solution chemistry studies have been to assess students understanding level of solution chemistry and in some studies compare understanding based on age and year at school or college. The methods of exploring students conceptions consisted of interviews, paper and pencil surveys (open-ended questions and multiple-choice questions), free writing and drawings and the validity of these methods have been highlighted. The general knowledge claims synthesized in this study are students (a) attending to mechanical events, (b) preference for everyday language usage over chemical language, (c) confusing solution chemistry with non-related concepts, (d) lack of sub-microscopic explanation for macroscopic observation, (e) difficulty with visualizing and representing sub-microscopic ideas, (f) difficulty with symbolic representations, (g) inconsistent explanations, (h) development of student understanding with age, and (i) development of conservation reasoning with age. To incorporate students conceptions, conceptual change studies have used strategies such as worksheet, analogy, collaboratively working with a teacher, hypermedia, and group exploration. The results of conceptual change studies generally have had a positive impact enabling students to consider their ideas and develop plausible models of solution chemistry. For improvement of student learning in chemistry, this review of solution chemistry studies sheds light on teacher thinking and capacity building with respect to explicitly incorporating students conceptions into chemistry curriculum; practicing research-based strategies; forging links among types of chemical knowledge; collaborating for experimental teaching; and conducting further research.     

网上调查浅谈

网上调查是未来调查研究的发展方向和趋势.与传统调查方式相比,它具有自愿性、定向性、互动性、经济性、及时性、匿名性等特征.《档案界》网站开通后,《档案管理》杂志已经具备开展网上调查的基本条件.通过对网上调查的特点和优势、《档案管理》杂志开展网上调查的可行性以及网上调查的局限性进行分析,对《档案界》开展网上调查有关问题进行了思考.     

Creating the Civil Society East and West: Relationality,responsibility and the education of the humane person

Abstract

A recurring theme in many places concerns the nurturing and maintenance of a civil society that is committed to justice, to human fulfilment and a community that actively pursues the good of all its members. The creation of a civil society where there is respect for persons and a concern for the good of others is an important social aim and though it is not the sole responsibility of educational institutions, they have a crucial role to play in its development. It also evident that the creation of a civil society includes the family and the wider community and so in order to understand how a civil society is to be fostered, we need to understand relationality, a central concept in both the Western and Eastern understandings of human nature. If we reflect on contemporary education in both the East and the West, an important question to consider is the extent to which education measures up to developing in young people a sense of their responsibilities to one another, their families and to the wider community. In short the question of how well we are developing humane persons who are able to relate to one another and build a civil society. This article argues that there needs to be a rebalancing of the aims of education to include the development of those values and dispositions that will foster a civil society.     

Counseling Outcome as a Function of Counselor Nationality for American Expatriate Clients

This study tested the proposition that national similarity between counselor and client results in improved counseling outcome. Using a repeated-measures, quasi-experimental design, eight female counselors (four Turkish, four American) saw 16 volunteer, expatriate female American clients for single, individual counseling sessions. Results indicated no differences on (a) clients’ and counselors’ ratings of working alliance and of progress on goals, or (b) clients’ ratings of utilization intent as a function of counselor nationality. Irrespective of nationality, clients’ ratings of working alliance were higher than their counselors. These results echo a trend suggesting that clients’ preferences for cultural/ethnic similarity dissipate as the research methodology approximates actual counseling sessions. Additionally, local mental health service providers may be a viable resource for expatriate Americans.     

Yes,Memorize

The endless wealth of information on the internet sharpens the question: how much and what is really important for us to remember? This issue is related to questions regarding the core processes involved in reasoning and thinking. We present mental manipulation (MM) as the core of reasoning and examine the above‐mentioned issue in light of MM's vital role in reasoning and problem‐solving.     

100MHz数字频率计的设计

100MHz数字频率计用VHDL语言编程设计,主要由五个模块组成,分别是测频控制信号发生器、十进制计数器、32位锁存器、分频器、动态扫描译码驱动器模块五部分构成.选用分频器将工作时钟分频后,用测频器测频,将被测频率信号经脉冲整形电路后作为计数器的计数脉冲,加入计数器的输入端,测量一定闸门时间内被测信号的脉冲个数,并将其计数值锁存进锁存器中,最后通过动态扫描译码器读出数值,该频率计精度高,可用于频率测量、机械转速测量等领域.     

Premarital Sex, Social Support, Submissive Behaviors, and Loneliness Among Turkish University Students

The purpose of this study was to investigate whether differences in social support, submissive behaviors, and loneliness existed among Turkish university students who had had premarital sexual intercourse and those who had not. Using self-reported questionnaires, students who had experienced sexual intercourse were contrasted with those who had not. Data were gathered on 420 university students in Ankara, Turkey. MANOVA statistics were used in the data analysis. Results indicated that more than 75?% of the total respondents reported that they had never had sexual intercourse; the frequency of sexual intercourse was higher among males than females. It was found that students who had had sexual intercourse reported less perceived support from family. The two groups were not significantly different, however, in perceived support from friends, submissive behaviors and loneliness. Possible interpretations of these data and implications for future study are suggested.