Examining features of how professional development and enactment of educative curricula influences elementary science teacher learning     

Ellen M. Granger  Todd H. Bevis  Sherry A. Southerland  Yavuz Saka  Fengfeng Ke 《科学教学研究杂志》2019,56(3):348-370

This research examines factors influencing elementary science teacher learning as they participate in professional development with and enactment of educative curricula in comparison with learning following limited professional development and enactment of traditional curricula. Using a randomized cluster design (125 teachers and 2,694 students in 4th—5th grades) that met the What Works Clearinghouse standards without reservations, teacher learning was conceptualized using four outcomes. Data were analyzed using standard single-level multiple regression models and possible mediation models for the teacher outcomes were considered using piecewise multiple regression and path analytic approaches. Treatment group teachers experienced greater increases in content knowledge, views of science inquiry, beliefs about reform-based teaching, and teaching self-efficacy than comparison group teachers. The findings indicate that what teachers learn from the combination of professional development and teaching with educative curriculum varies according to what their knowledge and beliefs are on entering the experience. Surprisingly, high entry-level self-efficacy was associated not only with lower learning gains for the teachers, but also for their students. Finally, teachers' space science learning and that of their students are implicated as mediators of the positive effect of the professional development and educative curriculum enactment on teacher beliefs about reform science teaching. This work refines and extends a theoretical framework of teachers' participatory relationship with curricula.  相似文献   

Exploring How Second Grade Elementary Teachers Translate Their Nature of Science Views into Classroom Practice After a Graduate Level Nature of Science Course     

Hasan Deniz  Elif Adibelli 《Research in Science Education》2015,45(6):867-888

The main purpose of this study was to explore the factors mediating the translation of second grade teachers’ nature of science (NOS) views into classroom practice after completing a graduate level NOS course. Four second grade in-service elementary teachers comprised the sample of this study. Data were collected from several sources during the course of this study. The primary data sources were (a) assessment of the elementary teachers’ NOS views before and after the graduate level NOS course using the Views of Nature of Science Questionnaire Version B (VNOS-B) (Lederman et al., 2002) coupled with interviews, and (b) a classroom observation and videotaped recording of the elementary teachers’ best NOS lessons coupled with interview. We identified three distinct but related factors that mediated the translation of NOS views into classroom practice: the teachers’ perspectives about the developmental appropriateness of the NOS aspect, the teachers’ selection of target NOS aspects, and the relative importance placed by teachers on each NOS aspect.  相似文献   

The effectiveness of farm programmes on Bangladesh Betar in educating farmers     

Md. Mahedi Hasan  Md. Nurul Islam  Md. Aminul Hoque 《Open Learning》2017,32(3):214-223

Farm programmes (FPs) of varied categories have been developed and aired over several decades by Bangladesh Betar, the national radio of Bangladesh for the diffusion of farm technologies. The study aimed to produce an in-depth academic evaluation of their effectiveness in educating farmers in Bangladesh. A sample of 465 respondents from the Khulna and Rajshahi divisions in Bangladesh was randomly selected for a questionnaire survey. To analyse the data, relevant documents were collected from the Ministry of Information, the Ministry of Agriculture, and the Ministry of Fisheries and Livestock of Bangladesh. Frequency distribution, z-test, and binary logistic regression analysis were used as statistical tools. The farm knowledge levels of the farmers were considered the predictors for evaluating the effectiveness of FPs. The results revealed that 93.33% of the sample did not listen to the FPs, while only very few of the listeners listened regularly. Despite this, at the ‘weak’ and ‘average’ levels of knowledge significant differences were noted between listener and non-listener farmers of FPs. The binary logistic regression analysis (Model 1) identified that the farmers who listened to the FPs were likely to acquire farm knowledge 6.62 times more than the farmers who did not listen to the FPs. The farmers who listened to the FPs were likely to have farm knowledge 2.64 times more than the farmers who did not listen to the FPs but consulted with other sources of farming information (Model 2). Similarly, a listener of FPs with farm training was likely to acquire farm knowledge 5.76 times more than a non-listener with farm training (Model 3). The FPs were found to be very effective and could be used to better complement other mechanisms for educating farmers. Regular access to the FPs ought to be ensured through appropriate stimulants for the diffusion of farm technologies.  相似文献   

Starlight in darkness     

Priya Hasan 《Resonance》2017,22(3):213-224

This article will briefly review the theory of star formation (SF) and its development using observations. This is very relevant in the present context since planet formation appears to be a by-product of SF, and the whole question of life in the universe and its origin can be viewed with a new perspective.  相似文献   

Improving graph-based random walks for complex question answering using syntactic,shallow semantic and extended string subsequence kernels     

Yllias Chali  Sadid A. Hasan  Shafiq R. Joty 《Information processing & management》2011

The task of answering complex questions requires inferencing and synthesizing information from multiple documents that can be seen as a kind of topic-oriented, informative multi-document summarization. In generic summarization the stochastic, graph-based random walk method to compute the relative importance of textual units (i.e. sentences) is proved to be very successful. However, the major limitation of the TF^*IDF approach is that it only retains the frequency of the words and does not take into account the sequence, syntactic and semantic information. This paper presents the impact of syntactic and semantic information in the graph-based random walk method for answering complex questions. Initially, we apply tree kernel functions to perform the similarity measures between sentences in the random walk framework. Then, we extend our work further to incorporate the Extended String Subsequence Kernel (ESSK) to perform the task in a similar manner. Experimental results show the effectiveness of the use of kernels to include the syntactic and semantic information for this task.  相似文献   

Characterization of two-dimensional cellular automata over ternary fields     

Irfan Siap  Hasan Akin 《Journal of The Franklin Institute》2011,348(7):1258-1275

The set of papers [3], [4], [6] and [7] (Chattopadhyay et al., 1999; Dihidar and Choudhury, 2004; Khan et al., 1997, 1999) deals with the behavior of the uniform two-dimensional cellular automata over binary fields (Z₂). Some structural properties and precise mathematical models using matrix algebra over the field Z₂ are reported for characterizing the behavior of two-dimensional nearest neighborhood linear cellular automata with null and periodic boundary conditions [3], [4], [6] and [7] (Chattopadhyay et al., 1999; Dihidar and Choudhury, 2004; Khan et al., 1997, 1999). In this paper, we characterize two-dimensional linear cellular automata transformations by using matrix algebra built on Z₃. We analyze some results for two-dimensional CA with rule numbers 2460N and 2460P. Finally, we investigate the dimension of the kernel of two-dimensional cellular automata defined by the rule number 2460N.  相似文献   

Leadership styles and decision-making styles in an Indonesian school context     

Hasan Hariri  Murray Prideaux 《School Leadership & Management》2014,34(3):284-298

School leadership has been well researched in developed countries. However, in Asia, particularly in Indonesia, school leadership has not been well explored. Using survey data from a sample of 475 teachers in six Lampung school districts, this paper examines the relationships between school principal leadership styles and school principal decision-making styles in an Indonesian school context. Findings are that most of the relationships between school principal leadership styles and school principal decision-making styles are significant. These findings suggest that teachers perceive that principals should exhibit much more transformational leadership style and rational decision-making style but avoid laissez-faire leadership style and avoidant decision-making style.  相似文献   

Who are the Science Teachers that Seek Professional Development in Research Experience for Teachers (RET’s)? Implications for Teacher Professional Development     

Yavuz Saka 《Journal of Science Education and Technology》2013,22(6):934-951

To address the need to better prepare teachers to enact science education reforms, the National Science Foundation has supported a Research Experience for Teachers (RET’s) format for teacher professional development. In these experiences, teachers work closely with practicing scientists to engage in authentic scientific inquiry. Although there are many RET programs currently serving teachers, there is only a small body of research describing these programs and their outcomes. Just as science learning depends on both cognitive and affective factors of learners, the success of teacher professional development also depends on the cognitive and affective factors of the participants. Thus, the intent of this mixed method research is to better understand how the nature of professional development experiences shape the kinds of teachers that apply, and what this means for the design of such experiences. This study focused on describing the cognitive and affective characteristics of applicants for two different RET programs offered at the same institution. Findings suggest that the profiles of teachers who seek out these professional development programs vary based on the programs’ objectives. The findings also suggest that recognition of who is being served in professional development must be considered in the construction of those professional development experiences.  相似文献   

The effect of technology-supported collaborative problem solving method on students’ achievement and engagement     

Unal  Erhan  Cakir  Hasan 《Education and Information Technologies》2021,26(4):4127-4150

Education and Information Technologies - This study aimed to determine the effect of web 2.0 technologies supported collaborative problem solving method on students’ achievement and...  相似文献   

Introducing Children to Anatomy: “Getting to Know Our Bodies: The First Step Toward Becoming a Scientist”     

Gursel Ortug  Ahmet Midi  Deniz Sude Elbizim  Hasan Karaot  Elif Yılık  Işılsu Ezgi Uluışık 《Anatomical sciences education》2021,14(2):232-240

Museums are used in every discipline to collect, classify, and present information for scientific purposes. They also serve as an effective educational medium. Since the establishment of a boutique anatomy museum at Bahçeşehir University, lectures, conferences, and seminars have been organized there over the past four years on the history of human anatomy and the human body. In order to raise awareness about the need to make anatomy accessible to kindergarteners and school-aged children, rather than exclusively to undergraduate students, activities that are suited to a wide range of ages have been developed at the museum and at the anatomy laboratory. Four different sessions were conducted, including activities such as lectures using plastic models as props, shaping organs out of playdough, anatomy puzzles, watching cartoons, and examining specimens through a microscope. Healthy and pathologic anatomies were chosen to match daily themes. Among the kindergarteners and elementary school children, no grading was done, nor was any questionnaire administered; however, a survey was administered in the 10–12 age group (N = 64). According to the students' written feedback, 93.75% said they “are happy with microscope activities” while 84.37% said they “had so much fun” participating in the playdough activities. However, 18.75% criticized the activities, saying they “could have been longer.” In conclusion, it is believed that these “getting to know our bodies” activities that were hosted in the anatomy museum, including conferences, workshops, material preparation, and instructional movies, may play an important role in the development of a healthy society.  相似文献