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51.
Abstract The purpose of this study was to compare response times among four starting techniques—cross-over step, jab-step, standing sprinter's start, and the momentum start—to determine the fastest start for optimum speed in base running in slow pitch softball. The subjects were 30 adult male amateur softball players. Response time was recorded to the nearest 1/100 second using a Dekan Automatic Performance Analyzer arranged with two starting lights and a stop gate. A one way repeated measures ANOVA indicated that the momentum start was significantly (p < .01) faster than the other starts compared while there were no significant differences among the other starts. Reliability coefficients ranging from .90 to .95, obtained using the intraclass correlation coefficient for multiple trial data, signified no trends among trials and high reliability of the testing procedures and equipment. The results suggested that the momentum start was the fastest starting technique for optimum speed for running bases in slow pitch softball. 相似文献
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Israel Scheffler 《Science & Education》1992,1(4):385-394
This paper is reprinted from Israel Scheffler's Reason and Teaching (Bobbs-Merrill, 1973). It is the first of a number of classic paper which Science & Education will reprint in forthcoming volumes. These are being reprinted because their arguments still warrant attention and they are increasingly inaccessible to a good number of subscribers. 相似文献
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Robert M. Aiken Marie-Noelle Bessagnet Judith Israel 《Education and Information Technologies》2005,10(1-2):67-82
The goal of this research is to design and prototype an intelligent collaborative learning environment. Within this environment, we study synchronous interaction among group members (students) working on a problem/project. Students use an Intelligent Collaborative Support System (ICSS) and a shared activity space: the Tulka Whiteboard. Two main interaction spaces have been implemented: a planning-communication space and a production space. Dialogue and negotiation are supported through the ICSS permitting exchange and evaluation of free-text communication messages that are initiated by students choosing sentence openers from a menu. Using the whiteboard, a virtual room is dedicated to a group of students who share documents, annotations on documents, drawing tools, and text tools. Each group is provided a dynamic assessment of their collaborative skills based on a communication skills model. 相似文献
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Predicting academic achievement by class‐level emotions and perceived homeroom teachers’ emotional support 下载免费PDF全文
Gabriela Kashy‐Rosenbaum Oren Kaplan Yael Israel‐Cohen 《Psychology in the schools》2018,55(7):770-782
Using a multilevel approach, this study examined the role of classroom emotional climate on students' academic achievement. Positive and negative emotions and homeroom teachers' support were used to assess the classroom emotional climate on the individual and class levels. To our knowledge, no study to date has investigated these specific aspects of the classroom emotional climate in relation to students' GPA. Data were collected from 73 classrooms in grades 7‐12 (N = 1,641, students; 53% female) across three schools in Israel. Findings revealed that aggregated levels of both positive affect and perceived homeroom teacher support were positively tied to GPA and that aggregated levels of negative affect were negatively tied to GPA. The final model included gender, teacher support, individual and class emotions and explained 14% of within‐class GPA. A central implication of this study is the relevance of having an emotionally supportive homeroom teacher for students' academic achievement. 相似文献
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David Fortus Marcus Kubsch Tom Bielik Joseph Krajcik Yaron Lehavi Knut Neumann Jeffrey Nordine Sebastian Opitz Israel Touitou 《科学教学研究杂志》2019,56(10):1341-1361
Energy is a central concept in science in every discipline and also an essential player in many of the issues facing people everywhere on the globe. However, studies have shown that by the end of K-12 schooling, most students do not reach the level of understanding required to be able to use energy to make sense of a wide range of phenomena. Many researchers have questioned whether the conceptual foundations of traditional approaches to energy instruction may be responsible for students' difficulties. In response to these concerns, we developed and tested a novel approach to middle school physical science energy instruction that was informed by the recommendations of the Framework for K-12 Science Education (National Research Council, 2012a) and the Next Generation Science Standards (NGSS) (NGSS Lead States, 2013). This new approach differs substantially from more traditional approaches to energy instruction in that it does not require energy forms and it emphasizes connections between energy, systems, and fields that mediate interaction-at-a-distance. We investigated student learning during this novel approach and contrasted it with student learning within a comparable unit based on a more traditional approach to energy instruction. Our findings indicate that students who learned in the new approach outperformed students who learned in the traditional approach in every quantitative and qualitative aspect considered in this study, irrespective of their prior knowledge of energy. They developed more parsimonious knowledge networks in relation to energy that focused primarily around the concept of energy transfer. This study warrants further investigation into the value of this new approach to energy instruction in both middle and high school. 相似文献
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Hila May Haim Cohen Bahaa Medlej Liora Kornreich Nathan Peled Israel Hershkovitz 《Anatomical sciences education》2013,6(5):332-341
Rapid changes in medical knowledge are forcing continuous adaptation of the basic science courses in medical schools. This article discusses a three‐year experience developing a new Computed Tomography (CT)‐based anatomy curriculum at the Sackler School of Medicine, Tel Aviv University, including describing the motivations and reasoning for the new curriculum, the CT‐based learning system itself, practical examples of visual dissections, and student assessments of the new curriculum. At the heart of this new curriculum is the emphasis on studying anatomy by navigating inside the bodies of various living individuals utilizing a CT viewer. To assess the students’ experience with the new CT‐based learning method, an anonymous questionnaire was administered at the end of the course for three consecutive academic years: 2008/2009, 2009/2010, 2010/2011. Based upon the results, modifications were made to the curriculum in the summers of 2009 and 2010. Results showed that: (1) during these three years the number of students extensively using the CT system quadrupled (from 11% to 46%); (2) students' satisfaction from radiologists involvement increased by 150%; and (3) student appreciation of the CT‐based learning method significantly increased (from 13% to 68%). It was concluded that discouraging results (mainly negative feedback from students) during the first years and a priori opposition from the teaching staff should not weaken efforts to develop new teaching methods in the field of anatomy. Incorporating a new curriculum requires time and patience. Student and staff satisfaction, along with utilization of the new system, will increase with the improvement of impeding factors. Anat Sci Educ 6: 332–341. © 2013 American Association of Anatomists. 相似文献
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Israel Kleiner 《Educational Studies in Mathematics》2001,48(2-3):137-174
The infinitely small and the infinitely large are essential in calculus. They have appeared throughout its history in various
guises: infinitesimals, indivisibles, differentials, evanescent quantities, moments, infinitely large and infinitely small
magnitudes, infinite sums, power series, limits, and hyperreal numbers. And they have been fundamental at both the technical
and conceptual levels – as underlying tools of the subject and as its foundational underpinnings. We will consider examples
of these aspects of the infinitely small and large as they unfolded in the history of calculus from the 17th through the 20th centuries. We will also present `didactic observations' at relevant places in the historical account.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献