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991.
Leman Tarhan Yıldızay Ayyıldız Aylin Ogunc Burcin Acar Sesen 《Research in Science & Technological Education》2013,31(2):184-203
Cooperative learning is an active learning approach in which students work together in small groups to complete an assigned task. Students commonly find the subject of ‘physical and chemical changes’ difficult and abstract, and thus they generally have many misconceptions about it. Purpose This study aimed to investigate the effects of jigsaw cooperative learning activities developed by the researchers on sixth grade students’ understanding of physical and chemical changes. Sample Participants in the study were 61 sixth grade students in a public elementary school in Izmir, Turkey. Design and methods A pre-test and post-test experimental design with a control group was used, and students were randomly assigned to the experimental and control groups. Instruction of the subject was conducted via jigsaw cooperative learning in the experimental group and via teacher-centered instruction in the control group. During the jigsaw process, experimental group students studied the subjects of changes of state, changes in shape and molecular solubility from physical changes, and acid–base reactions, combustion reactions and changes depending on heating from chemical changes in their jigsaw groups. Results The concept test results showed that jigsaw cooperative learning instruction yielded significantly better acquisition of scientific concepts related to physical and chemical changes, compared to traditional learning. Students in the experimental group had a lower proportion of misconceptions than those in the control group, and some misconceptions in the control group were identified for the first time in this study. Conclusions Jigsaw cooperative learning is an effective teaching technique for challenging sixth grade students’ misconceptions in the context of physical and chemical changes, and enhancing their motivation, learning achievements, self-confidence and willingness in the science and technology lesson. This technique could be applied to other chemistry subjects and other grade levels. 相似文献
992.
J. F. Arteaga M. J. Díaz Blanco C. Toscano Fuentes 《European Journal of Engineering Education》2013,38(4):370-384
The objective of this work is to investigate how most of the competences required by engineering students may be developed through an active methodology based on cooperative learning/evaluation. Cooperative learning was employed by the University of Huelva's third-year engineering students. The teaching methodology pretends to create some of the most relevant engineering skills required nowadays such as the ability to cooperate finding appropriate information; the ability to solve problems through critical and creative thinking; and the ability to make decisions and to communicate effectively. The statistical study carried out supports the hypothesis that comprehensive and well-defined protocols in the development of the subject, the rubric and cooperative evaluation allow students to acquire a successful learning. 相似文献
993.
Carrie Newsom Jimmie Lundgren Nancy Mitchell Poehlmann 《Cataloging & classification quarterly》2013,51(4):412-424
ABSTRACT We developed a project utilizing the local form/genre heading, “property data,” and specific subheadings to help chemists, engineers, and those librarians assisting them to more easily locate library resources containing chemical and physical properties of substances. This article describes the project and examines possibilities for improving access to physical sciences literature in relation to Library of Congress Subject Headings and ongoing developments in authority records for form/genre terms. It also introduces functionality of such headings in the new “next generation” catalogs. 相似文献
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天然水体中金属污染物的来源迁移及控制 总被引:1,自引:0,他引:1
薛岚 《宁德师专学报(自然科学版)》2001,13(4):372-374
从天然水的组成及循环规律入手 ,探讨天然水体中金属污染物的来源、分布、迁移规律及对人类的危害 ,并简述废水的化学治理方法 相似文献
997.
甘泉 《赣南师范学院学报》2003,(3):130-131
本文从创设情境,积极参与;尊重个性、自由选择;开放创新,独立思考;注重动手,积极探索;设置困难,拓展思维;假设论证,激发想像这6方面具体探讨了中学化学教学中培养学生探究性学习能力的有效方法. 相似文献
998.
国外族性化学结构标引及检索方法的研究始于20世纪50年代,目前已基本成熟,其中最有代表性的是STN和Questel*Orbit两大国际联机检索系统中的REGISTRY、MARPAT和MMS族性化学结构数据库.我国在该领域的研究始于20世纪80年代,现正在进行之中.研究国外族性化学结构标引及检索方法对加速我国化学结构数据库的建设具有现实意义.本文将我国正在使用和正在研究中的化学结构标引及检索系统与国外两大系统进行对比,从中找出差距,对我国族性化学结构标引及检索系统提出了改进建议. 相似文献
999.
化学教学中如何渗透德育教育 总被引:1,自引:0,他引:1
李清林 《泸州职业技术学院学报》2007,(2)
教书育人是教师的职责,要挖掘教学中的德育素材,对学生进行必要的德育。要利用化学史对学生进行爱国主义教育,利用化学实验培养学生理论联系实际的作风,利用化学结构美培养学生的集体主义观念,利用化学实验反应和学生对实验的浓厚兴趣对学生进行人生观和成才教育并培养学生健康的人格,利用化学实例对学生进行辩证唯物主义教育,利用化学发现史渗透科学态度的教育。 相似文献
1000.
薛梅 《扬州教育学院学报》2001,19(3):33-35
化学活动课程是培养学生创新精神和实践能力的重要阵地.本文讨论了在化学活动课程中实验方案设计的基本要求和发展方向. 相似文献