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102.
John M. Reveles Gregory J. Kelly Richard P. Durán 《Cultural Studies of Science Education》2007,1(3):467-495
This ethnographic study of a third grade classroom examined elementary school science learning as a sociocultural accomplishment.
The research focused on how a teacher helped his students acquire psychological tools for learning to think and engage in
scientific practices as locally defined. Analyses of classroom discourse examined both how the teacher used mediational strategies
to frame disciplinary knowledge in science as well as how students internalized and appropriated ways of knowing in science.
The study documented and analyzed how students came to appropriate scientific knowledge as their own in an ongoing manner
tied to their identities as student scientists. Implications for sociocultural theory in science education research are discussed.
John Reveles is an assistant professor in the Elementary Education Department at California State University, Northridge. He received
his Ph.D. from the University of California, Santa Barbara in 2005. Before pursuing his Ph.D., he worked as a bilingual elementary
school teacher for 3 years. His research focuses on the development of scientific literacy in elementary school settings;
sociocultural influences on students' academic identity; equity of access issues in science education; qualitative and quantitative
research methods. Within the Michael D. Eisner College of Education, he teaches elementary science curriculum methods courses,
graduate science education seminars, and graduate research courses.
Gregory Kelly is a professor of science education at Penn State University. He is a former Peace Corps Volunteer and physics teacher. He
received his Ph.D. from Cornell in 1994. His research focuses on classroom discourse, epistemology, and science learning.
This work has been supported by grants from Spencer Foundation, National Science Foundation, and the National Academy of Education.
He teaches courses concerning the uses of history, philosophy, sociology of science in science teaching and teaching and learning
science in secondary schools. He is editor of the journal Science Education.
Richard Durán is a Professor in the Gevirtz Graduate School of Education, University of California, Santa Barbara. His research and publications
have been in the areas of literacy and assessment of English Language Learners and Latino students. He has also conducted
research on after school computer clubs, technology and learning as part of the international UC Links Network. With support
from the Kellogg Foundation, he is implementing and investigating community and family-centered intervention programs serving
the educational progress of Latino students in the middle and high school grades. 相似文献
103.
朱昌彻 《赣南师范学院学报》2003,(1):18-22
王廷相在认识的来源上提出“合内外而一之” ,论证了一切认识都是主观对客观的反映 ;在认识的途径上 ,提出可分“见闻”和“思虑”两阶段 ,并阐述了两个阶段的区别和联系 ,反对“见闻”和“思虑”之外 ,别有所谓“德性之知” ;在知与行的关系上提出“知行兼举” ,强调实践的极端重要性 ,发展了古代朴素唯物主义认识论。当然 ,其认识论也有缺陷 相似文献
104.
曹俊军 《湖南师范大学教育科学学报》2004,3(2):75-77
中小学教学活动,关键在于充分体现教学的主体性精神。承认学生在教学中处于主体地位,即承认学生在教学中既是认识活动的主体,又是价值活动的主体。活动是学生主体地位得到落实的重要保证。学生的活动及活动方式必须得到巧妙的安排和组织。 相似文献
105.
卢爱静 《唐山师范学院学报》2007,29(4):140-141
从英语学科的角度比较应试教育和素质教育,就英语教学在素质教育中的作用加以分析,并对在英语教学中如何有效整合各方面的素质进行了论述。 相似文献
106.
周睿 《合肥教育学院学报》2007,24(5):103-105,120
兴起于20世纪20年代的活动理论是理解和构建情境脉络中活动的有益框架,分析活动理论对设计网络环境下的合作学习活动具有现实指导意义。在对网络合作学习的内涵、特点及优势分析的基础上,提出在活动理论指导下,基于网络的合作学习活动的教学设计方法。 相似文献
107.
108.
研究性学习活动的设计与实施 总被引:1,自引:0,他引:1
随着新课程计划的实施,作为培养创新精神和实践能力的研究性学习活动已在不少省市展开,为了避免活动的盲目性,本文就研究性学习活动设计与实施中的目标、内容、程序及评价等作必要的探讨. 相似文献
109.
Ramesh Chander Farhan Rizvi A. K Khanna Ram Pratap 《Indian journal of clinical biochemistry : IJCB》2003,18(2):71-79
Guggulsterone, a mixture of cis (E) and trans (Z) isomers (7∶3 w/w) was synthesized from 16-DPA. The isomers were separated
by column chromatography and evaluated for cardioprotective and antioxidant activities. Myocardial necrosis induced by isoproterenol
in rats caused marked increase in serum creatine phosphokinase and glutamate pyruvate transaminase. Simultaneously in ischemic
heart, phospholipase, xanthine oxidase and lipid peroxides were enhanced following depletion of glycogen, phospholipids and
cholesterol. Treatment with guggulsterone and its both isomers at the dose of 50 mg/kg po., significantly protected cardiac
damage as assessed by the reversal of blood and heart biochemical parameters in ischemic rats. The cardioprotective activity
of guggulsterone and of both the isomers were compared with that of gemfibrozil at the same doses. Guggulsterone and both
the isomers at tested concentrations (5–20mM) inhibited oxidative degradation of lipids in human low-density lipoprotein and
rat liver microsomes induced by metal ionsin vitro. The drug counteracted against the generation of superoxide anions (O2) and hydroxyl radicals (OH−) in non-enzymic test systems. It is suggested that cardioprotective and antioxidant activities of synthetic guggulsterone
and guggulsterone obtained from gum resinCommiphora mukul that contains isomers E & Z in the ratio of 46∶54w/w are the same. 相似文献
110.
The objective of this study was to evaluate acrosin activity in spermatozoa of infertile Nigerian men and to compare with
those of the fertile men. The acrosin activity was evaluated using the Acroscreen reagent kit. The acrosin activity of the
fertile men was 40.7±5.2 mIU/106 sperm (range 30.1–51.3) and those of the infertile men was 22.4±8.33 mIU/106 sperm (range 5.7–39.1). The difference in the mean was statistically significant (P<0.001). There was a subpopulation of
the infertile men who had their acrosin activity within normal range of the fertile men, 32.9±1.57 mIU/106 sperm. But the difference in the mean was statistically significant (P<0.001). Acrosin activity decreased with increased
morphological changes in the spermatozoa. It is concluded that acrosin activity in the infertile Nigerian men is significantly
lower than that in the fertile men. Acrosin activity may also be affected by morphological changes in the spermatozoa. 相似文献