排序方式： 共有83条查询结果，搜索用时 15 毫秒
61.
Isabelle Hugener Christine Pauli Kurt Reusser Frank Lipowsky Katrin Rakoczy Eckhard Klieme 《Learning and Instruction》2009,19(1):66-78
Based on a coding of 39 videotaped three-lesson units on the introduction to the Pythagorean Theorem, three teaching patterns were identified: lecturing, developing based on a problem, and discovery based on a problem. The analysis showed no effect of the teaching patterns on student achievement, whereas effects were discovered on students' perceived learning quality. The discovery teaching pattern had negative effects on the emotional quality of learning. However, this pattern exhibited high degree of externally rated cognitive activation. The lecturing approach to the introduction to the Pythagorean Theorem supported students' self-perceived understanding. 相似文献
62.
Social media open up multiple options to add a new dimension to learning and knowledge processes. Particularly, social networking sites allow students to connect formal and informal learning settings. Students can find like-minded people and organize informal knowledge exchange for educational purposes. However, little is known about in which way students use social networking sites for informal learning and about characteristics of these students. In this paper, three studies examined the study-related knowledge exchange via StudiVZ, the German equivalent of Facebook. Results indicated that about one fifth of participants exchange study-related knowledge through StudiVZ and that these students are especially freshers seeking contact with other students and orientation. Consistent with previous research, it is shown that students use social networking sites mainly for social interaction and integration. However, results also imply that communication about social issues on social networking sites goes hand in hand with study-related knowledge exchange. 相似文献
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64.
Marija Nikolic-Jaric Tim Cabel Elham Salimi Ashlesha Bhide Katrin Braasch Michael Butler Greg E. Bridges Douglas J. Thomson 《Biomicrofluidics》2013,7(2)
The instrument described here is an all-electronic dielectrophoresis (DEP) cytometer sensitive to changes in polarizability of single cells. The important novel feature of this work is the differential electrode array that allows independent detection and actuation of single cells within a short section ( ～ 300?μm) of the microfluidic channel. DEP actuation modifies the altitude of the cells flowing between two altitude detection sites in proportion to cell polarizability; changes in altitude smaller than 0.25 μm can be detected electronically. Analysis of individual experimental signatures allows us to make a simple connection between the Clausius-Mossotti factor (CMF) and the amount of vertical cell deflection during actuation. This results in an all-electronic, label-free differential detector that monitors changes in physiological properties of the living cells and can be fully automated and miniaturized in order to be used in various online and offline probes and point-of-care medical applications. High sensitivity of the DEP cytometer facilitates observations of delicate changes in cell polarization that occur at the onset of apoptosis. We illustrate the application of this concept on a population of Chinese hamster ovary (CHO) cells that were followed in their rapid transition from a healthy viable to an early apoptotic state. DEP cytometer viability estimates closely match an Annexin V assay (an early apoptosis marker) on the same population of cells. 相似文献
65.
A. Katrin Arens Friederike Helm Fabian Wolff Jens Möller 《Journal of Experimental Education》2020,88(2):245-264
AbstractThis study extended the internal/external reference model to multiple languages including students’ language of instruction, first foreign language, and second foreign language. We examined whether social and dimensional comparisons play similar roles in the formation of students’ self-concept related to different languages and whether dimensional comparisons result in contrast or assimilation effects. All students had German as the language of instruction and English as the first foreign language. Students were divided into a subsample (N?=?487) learning French as a second foreign language and a subsample (N?=?481) learning Latin. Invariance tests demonstrated that the achievement–self-concept relations were similar across the subsamples, but interesting group differences became apparent when analyzing the French and Latin subsamples separately. 相似文献
66.
In the context of learning implementation of new ideas e.g. knowledge management in organizations often is neglected. Concerning
knowledge management measures we demonstrate its implementation in organizations. A theoretical framework was developed showing
the necessary basic conditions for implementing knowledge management. Subsequently we integrate the framework into a process
model illustrated by a case study. 相似文献
67.
Margus Pedaste li Leijen Katrin Poom‐Valickis Eve Eisenschmidt 《European Journal of Education》2019,54(3):389-399
In the modern world, teachers are expected to be ‘learning professionals’ who constantly expand their knowledge and skills and share both practical and theoretical insights in a community of colleagues. Teacher professional competence‐based standards could be an instrument to support teachers' professional learning if they are integrated with broader assessment and evaluation frameworks and if their evaluation, professional development and career advancement are in line with the standards. In Estonia, teacher professional standards were first developed in 2005. Currently, they support initial teacher education, the evaluation of teacher competences and the design of continuous professional learning. They also allow teachers to progress to the senior teacher and master teacher qualification level. According to our findings, the standards are successfully used to design pre‐service education and award certificates at the end of the studies. However, they do not support building the teachers' career ladder and only in some schools do they support planning of professional learning. In this article, we give an overview of the changes in the professional standards of teachers in Estonia and analyse why they have not found the desired degree of use in teachers' career advancement and professional development in the school context and why they have not had a significant effect on teacher status in society. 相似文献
68.
Hochberg Katrin Becker Sebastian Louis Malte Klein Pascal Kuhn Jochen 《Journal of Science Education and Technology》2020,29(2):303-317
Journal of Science Education and Technology - Mobile devices (smartphones or tablets) as experimental tools (METs) offer inspiring possibilities for science education, but until now, there has been... 相似文献
69.
Volker Trommsdorff Katrin Talke 《科研管理》2004,25(Z1):125-132
本文研究的目的是确定市场开发活动对NPD项目绩效的影响.假设为(a)市场进入战略及活动会直接提高创新绩效;(b)市场进入战略在对内外部市场开发活动不断熟悉的基础上正直接影响着创新绩效;(c)内部市场开发战略是在不断熟悉外部市场开发活动的基础上来提高创新绩效的;(d)市场进入过程中创新绩效的效果取决于创新的程度.为了证明假设的合理性,我们利用特定的测量模型建立了有效可靠的方法对134个NPD项目的数据进行收集和分析,然后根据路径模型验证创新的主要影响因素并对所提出的假设进行了大量的回归分析.结果表明市场进入活动对于NPD项目绩效有很大的影响,特别是市场开发战略及外部市场的开发活动会明显提高NPD项目的绩效. 相似文献
70.
Petra?PingerEmail author Katrin?Rakoczy Michael?Besser Eckhard?Klieme 《Learning Environments Research》2018,21(1):61-79
Formative assessment is considered to be a promising teaching practice for promoting teaching and learning processes. The implementation of teaching practices into instruction involves intervening with a learning environment that is characterised by certain features of instructional quality. Our study aims to contribute to the understanding of formative assessment by analysing the interplay between a formative assessment intervention and aspects of general instructional quality. In a quasi-experimental study design, 15 teachers participated in a control group (n = 361 students) and 20 teachers in the intervention classes (n = 498 students) implemented a curriculum-embedded formative assessment tool in their ninth-grade mathematics classes. No effects were found for the intervention on the assessed aspects of general instructional quality (process-oriented instruction, teacher–student relationship, effective use of instructional time). However, multilevel regression analyses revealed an interaction effect between the intervention and process-orientation and the effective use of instruction time. Our findings suggest that implementing formative assessment tools do not seem to suffice regarding changes in general instructional quality, but that an intervention with detailed material and guidelines can counterbalance effects of instructional quality, fostering students’ achievement in classes with lower degrees of process orientation and a less effective use of instructional time. 相似文献