A sociocultural perspective on mediated activity in third grade science

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.     

高校"形势与政策"课教学效果探讨

"形势与政策"课在高校思想政治理论课中的地位举足轻重,然而教学效果却并不尽如人意,如何提高"形势与政策"课的教学效果,是需要思想政治教育者深思的问题。本文拟从教学内容、教学方法、教学手段几个方面探讨如何增强"形势与政策"课的教学效果。     

普通车床数控化改造初探

机床数控化改造研究是提高我国技术装备水平的重要项目.我国目前拥有大量超期服役和技术陈旧的机床急待更新.由于资金受限,相比于添置新的数控机床,对机床进行数控化改造是一条节约资金、快速上马的有效途径.机床的数控化改造具有针对性强、大大节约原材料和资金以及扩大机床应用范围等优点,主要内容包括总体设计方案的确定、对机床导轨进行改造设计和自动回转刀架的选型与安装等.     

Problem Solving and Software Design

No abstract available for this article.     

计算机取证课程实验教学探讨

针对计算机取证课程的实验教学提出了两套方案,一套方案以模拟的场景开展教学,并阐述了每个场景的操作要求和方法,另一套方案以分配学时的方式开展教学,给出了教学安排表中一个项目的实验内容和具体步骤,文章结尾指出了改革实验教学方案实施的紧迫性和进一步完善的方向。     

项目教学法在机床电气与PLC课程教学中的运用

以机械设计制造及其自动化专业中的主要专业基础课程机床电气与PLC为载体,运用以工作过程为导向的项目教学法进行课程教学改革,精心设计了课程的项目教学体系。在项目的实施过程中,采取以学生为主体,＂教学做＂合一的教学模式,对于培养学生的应用技能,增强学生的＂大工程意识＂,提高课程教学的质量具有良好的效果。     

计算机取证的证明力

随着计算机信息技术的不断发展,与计算机相关的案例也不断出现。计算机取证被用来解决大量的计算机和网络犯罪,如网络入侵,军事、商业机密信息的窃取,对政府、军队、银行网站的攻击破坏,计算机欺诈,计算机病毒传播等,它已成为政府、军队部门以及商业公司信息安全保证的基本工作。利用具有法律效力的计算机取证方法,使用规范而客观的计算机取证技术,提取和保全合乎法律规程的电子证据。这种具备法律效力的电子证据,已逐渐成为一种崭新的证据形式。     

The experiences of deaf and hard of hearing students at a Queensland University: 1985–2005

This article reports on the experiences of deaf and hard of hearing students at a Queensland university, which offers an extensive deaf student support program. Seventy‐two current students and graduates since the program’s inception twenty years ago completed a survey about their experiences, highlights, challenges and use of communication tools and support services at university. Findings indicate, both quantitatively and qualitatively, that students valued the specialised support services they received, although challenges in accessing the academic curriculum remained for many students. In the important area of social factors, many students reported enjoying satisfying friendships and a sense of belonging with other deaf people, often for the first time, while others experienced feelings of social isolation in a largely hearing peer group. Overall, deaf and hard of hearing students who had attended Griffith over the 20 years had a high rate of graduation, comparing favourably with other university students.     

幼儿父母教养方式研究综述

对幼儿父母教养方式的概念、测评、影响因素等方面进行综述,发现现有研究中存在测评工具缺乏本土化、各因素的影响力及其之间的相互关系缺乏深入的分析以及提高幼儿父母教养方式的干预研究缺乏,这些都为今后的研究指明了方向。     

明清农具设计的科学性研究

中国古代农业的繁荣发展,离不开生产工具的科学运用。在农业发展史上盛极而衰的明清时期,其农具的发展在整体呈现出集大成的态势,主要表现在设计思想崇尚物我合一、设计材料追求综合利用、设计形式讲究方便省力等三个方面,具有非常明显的社会价值、经济价值和史料价值。