A Student-centred Approach: Assessing the Changes in Prospective Science Teachers’ Conceptual Understanding by Concept Mapping in a General Chemistry Laboratory

Although researchers in higher education propose alternatives to traditional approaches to assessment, traditional methods are commonly used in college or university science courses. The purpose of this study was to explore the feasibility and validity of Prospective Science Teachers’ (PSTs) concept maps as authentic assessment tools in a student-centred approach to describe the changes in the conceptual understanding of the PSTs in general chemistry laboratory investigations. After the PSTs (n = 47) decided on important issues, such as who would assess their concept maps and what scoring strategy and criteria would be used, they practiced assessing their own and peers’ concept maps during the first five laboratory investigations. They subsequently constructed and assessed pre- and post-laboratory concept maps in a student-centred approach consisting of self, peer, and instructor assessments for the five remaining laboratory investigations. The results of the study showed using pre- and post-laboratory concept maps as authentic assessment tools in a student-centred approach was valid and reliable for describing the conceptual understanding of the PSTs in a university general chemistry laboratory course. The results of individual interviews indicated most PSTs had positive views of their assessment practices in the laboratory course. This study also provides pedagogical implications for the training of science teachers.     

康熙《皇舆全览图》与乾隆《内府舆图》绘制情况对比研究——以东北地区为例

康熙《皇舆全览图》与乾隆《内府舆图》是清代采用西方制图方法绘制的两幅巨图,具有里程碑的意义。乾隆图因其后出,在绘制中大量参考、继承了康熙图的既有成果。一般认为。乾隆图的价值在于西北部分的增绘,研究与利用也多集中于此;而对两图在其他地区的细微变化则鲜有考察。文章通过比较两图相同区域内的水系、城镇绘制情况,发现乾隆图在内容上更丰富,一定程度上表现了自康熙朝至乾隆朝东北地区的发展变化。     

凸模糊映射次微分的性质

引入模糊数空间中凸模糊映射和模糊数导概念,定义了凸模糊映射循环单调映射的概念,找到并证明了多个凸模糊映射次微分的性质。     

新课程理念下高中数学课堂教学教师语言的探究

语言,是人与人交流沟通的主要渠道之一,也是传递知识的主要工具之一。在新课改的背景下,作为数学教师,要时刻注意自身的言行举止,主动参与到培训深造中,来提高自身的语言技能。这样才能保障教学工作的有序开展,提高教学效率与质量。     

OIL:构建语义网络的一种基础本体语言

本文介绍了一种在资源描述框架模式(RDFS)的基础上扩展的本体交互语言OIL，具有良好的层次结构和逻辑推理模式，是构建语义网格的基础性语言。     

试析新闻定义的“本位观”及“过程性”问题——对陆定一、范长江、宁树藩观点的再商榷

关于新闻定义的讨论一直是学术界关注的问题，针对较有影响的陆定一、范长江、宁树藩三位学术前辈关于新闻定义的观点进行了再讨论，分析其中值得借鉴与尚有欠缺之处，并提出了新闻定义中的受众本位观问题和强调“过程性”的定义思维，最终在有理有据的分析基础上给出定义：“新闻是及时公开报道的新近发生或发现的受众应知而未知或欲知而未知的信息”。     

二维保面积映象的拓扑熵

本文计算了二维保面积映象在经过倍周期分岔、同周期分岔到混沌时的拓扑熵,并得到这些映象通向混沌的各种道路和与其对应的拓扑熵之间的关系。     

论语文教师的现代教育理念

语文教学中存在种种弊端,主要根源之一就在于教师过时、陈腐、偏执的教育观念.面对知识经济的挑战,教育的各个领域必须进行全面的创新,语文教师更应树立现代教育理念,即大语文教育观、人文主义教育观、终身学习教育观、现代信息教育观.     

我国概念图研究概览

文章统计了1985.1—2005.6我国学者在概念图方面所发表论文的数目,分析了概念图研究的范域和成果,归纳了国人在概念图方面的研究特点与不足。     

利用概念图进行网络课程内容的设计研究

在简要介绍概念图和概念矩阵的基础上,以概念图和概念对知识体系表示的方法为依据,结合具体课程的结构,说明了构建网络课程教学内容的方法,并说明了该方法的优点。