Effects of a professional development program on classroom practices and outcomes for Latino dual language learners     

Virginia Buysse  Dina C. Castro  Ellen Peisner-Feinberg 《Early childhood research quarterly》2010

A randomized, controlled study was conducted to assess the effects of the Nuestros Niños professional development program on classroom practices and child outcomes related to language development and early literacy skills in both English and Spanish. Fifty-five teachers and 193 Latino dual language learners (DLLs) enrolled in the North Carolina More at Four Pre-Kindergarten Program participated in the study. The content of the professional development program consisted of research-based instructional practices designed to complement the core curriculum and scaffold learning for DLLs, and the format included professional development institutes, individualized consultation, and community of practice meetings. The results showed that the intervention led to measurable improvements in both the overall quality of teachers’ language and literacy practices as well as those specific to working with Latino DLLs, and greater gains in children's phonological awareness skills in their primary language.  相似文献   

Using Small-Scale Randomized Controlled Trials to Evaluate the Efficacy of New Curricular Materials     

Dina Drits-Esser  Kristin M. Bass  Louisa A. Stark 《CBE life sciences education》2014,13(4):593-601

How can researchers in K–12 contexts stay true to the principles of rigorous evaluation designs within the constraints of classroom settings and limited funding? This paper explores this question by presenting a small-scale randomized controlled trial (RCT) designed to test the efficacy of curricular supplemental materials on epigenetics. The researchers asked whether the curricular materials improved students’ understanding of the content more than an alternative set of activities. The field test was conducted in a diverse public high school setting with 145 students who were randomly assigned to a treatment or comparison condition. Findings indicate that students in the treatment condition scored significantly higher on the posttest than did students in the comparison group (effect size: Cohen''s d = 0.40). The paper discusses the strengths and limitations of the RCT, the contextual factors that influenced its enactment, and recommendations for others wishing to conduct small-scale rigorous evaluations in educational settings. Our intention is for this paper to serve as a case study for university science faculty members who wish to employ scientifically rigorous evaluations in K–12 settings while limiting the scope and budget of their work.  相似文献   

Multimodal biomedical image indexing and retrieval using descriptive text and global feature mapping     

Matthew S. Simpson  Dina Demner-Fushman  Sameer K. Antani  George R. Thoma 《Information Retrieval》2014,17(3):229-264

The images found within biomedical articles are sources of essential information useful for a variety of tasks. Due to the rapid growth of biomedical knowledge, image retrieval systems are increasingly becoming necessary tools for quickly accessing the most relevant images from the literature for a given information need. Unfortunately, article text can be a poor substitute for image content, limiting the effectiveness of existing text-based retrieval methods. Additionally, the use of visual similarity by content-based retrieval methods as the sole indicator of image relevance is problematic since the importance of an image can depend on its context rather than its appearance. For biomedical image retrieval, multimodal approaches are often desirable. We describe in this work a practical multimodal solution for indexing and retrieving the images contained in biomedical articles. Recognizing the importance of text in determining image relevance, our method combines a predominately text-based image representation with a limited amount of visual information, in the form of quantized content-based visual features, through a process called global feature mapping. The resulting multimodal image surrogates are easily indexed and searched using existing text-based retrieval systems. Our experimental results demonstrate that our multimodal strategy significantly improves upon the retrieval accuracy of existing approaches. In addition, unlike many retrieval methods that utilize content-based visual features, the response time of our approach is negligible, making it suitable for use with large collections.  相似文献   

Do you know where your book publishing business is?     

Kosmo Kalliarekos  Tammy Battaglino  Dina Connor 《Publishing Research Quarterly》2005,20(4):14-22

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Insights fourth and fifth graders bring to multiplication and division with decimals     

Anna O. Graeber  Dina Tirosh 《Educational Studies in Mathematics》1990,21(6):565-588

This study was designed to gain information about the understandings children in Israel and the United States have about multiplication and division of whole numbers that may be useful in building accurate understandings of these operations with decimals and the extent to which they hold conceptions about these operations that may interfere with their work with decimals. Data from interviews of the fourth and fifth graders indicate that students of this age already hold misconceptions such as multiplication always makes bigger. However they also hold conceptions that are prerequisite to understanding the area model of multiplication and the measurement model of division. These early conceptions might be used to build understanding of multiplication and division by decimals. Implications for the content and sequencing of instructional activities are presented.  相似文献   

Real and perceived employability: a comparison among Italian graduates     

Luca Caricati  Rita Chiesa  Dina Guglielmi  Marco Giovanni Mariani 《Journal of Higher Education Policy & Management》2016,38(4):490-502

The research undertaken for this article aims to analyse the correspondence between perceived employability and the actual national employment rate among Italian students and graduates undertaking different courses in a large Italian university. Data were collected through a cross-sectional survey of 2087 students in 19 faculties, and compared with the national indicators of employment rate for each faculty. Using faculty as unit of analysis, the results indicated a significant correlation between participants’ perceived employability and national employment rate. This trend was similar for both genders. However, the results showed a difference between bachelor’s and master’s degrees: the correlation between perceived and actual employability was not significant among bachelor’s participants while it remained significant among master’s participants. The results suggest that graduates are only partially aware of their possibility to enter the labour market and this, in turn, highlights that universities have only partially met the goal to increase awareness about the chances of finding a job among students and graduates.  相似文献   

Infinity – The never-ending struggle     

David Tall  Dina Tirosh 《Educational Studies in Mathematics》2001,48(2-3):129-136

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E-learning services acceptance in higher educational institutes: A case study in Brunei     

Aqilah Nawwarah H.A. Rajak  Dk. Nurul Najiah Pg Abu Bakar  Nur Dina Azyyati Lajim  Nurul Hikmatull Su’aidah Haji Kamarulzaman  Siti Nur Fakhrinah Haji Karim  Mohammad Nabil Almunawar 《Education and Information Technologies》2018,23(6):2341-2361

This research studies on the e-learning services acceptance in higher education institutions in Brunei Darussalam. This research has seven hypotheses, relating to independent, intermediary, and dependent variables. The independent variables include lecturer’s characteristics, design of learning contents, teaching materials, and playfulness; while the intermediary variables are perceived benefits and perceived ease of use. On the other hand, the dependent variable in this research is the intention to use e-learning. Multiple regression analysis were conducted to test the hypotheses proposed. Data analysis from this research has confirmed that the lecturer’s characteristics, teaching materials, perceived ease of use and the intention to use e-learning corresponds to the perceived benefits. Meanwhile, the design of learning content and the intention to use e-learning are positively related to the perceived ease of use and lastly, the variable playfulness is positively related to the intention to use e-learning.  相似文献   

Intuitive rules: A way to explain and predict students' reasoning     

Dina Tirosh  Ruth Stavy 《Educational Studies in Mathematics》1999,38(1-3):51-66

Through our work in mathematics and science education we have observed that students react similarly to a wide variety of conceptually unrelated situations. Our work suggests that many responses which the literature describes as alternative conceptions could be interpreted as evolving from common, intuitive rules. This paper describes and discusses one such rule, manifested when two systems are equal with respect to a certain quantity A but differ in another quantity B. We found that in such situations, students often argue that Same amount of A implies same amount of B. Our claim is that such responses are specific instances of the intuitive rule Same A—same B. This approach explains common sources for students'; conceptions and has strong predictive power.This revised version was published online in September 2005 with corrections to the Cover Date.  相似文献   

Students meet authentic science: the valence and foci of experiences reported by high-school biology students regarding their participation in a science outreach programme     

Dina Tsybulsky 《International Journal of Science Education》2019,41(5):567-585

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