How do students’ behaviors relate to the growth of their mathematical ideas?

The purpose of this study is to analyze the relationship between student behaviors and the growth of mathematical ideas (using the Pirie-Kieren model). This analysis was accomplished through a series of case studies, involving middle school students of varying ability levels, who were investigating a combinatorics problem in after-school problem-solving sessions. The results suggest that certain types of student behaviors appear to be associated with the growth of ideas and emerge in specific patterns. More specifically, as understanding grows, there is a general shift from behaviors such as students questioning each other, explaining and using their own and others’ ideas toward behaviors involving the setting up of hypothetical situations, linking of representations and connecting of contexts. Recognizing that certain types of student behaviors tend to emerge in specific layers of the Pirie-Kieren model can be important in helping us to understand the development of mathematical ideas in children.     

化学学科自主招生考试的探索与实践

In this paper, the authors demonstrated that laboratory skill examination could be a main approach to choose talented students by illustrating the fundamental reasons for using laboratory skill examination, the structure and content of the exam, how the exam was organized and conducted as well as the characteristics and results of the exam. The authors believe that the combination of interview and the laboratory skill examination is the best approach.     

高师化学本科生微格教学效果的调查与分析——以河南师范大学化学化工学院为例

以河南师范大学化学化工学院为例,通过问卷调查、访谈和课堂观察,从2013级师资型本科生对微格教学的认识和态度、在微格教学中的参与情况、对微格教学的评价以及对微格教学的建议等4方面进行了调研,针对发现的问题,提出了加强师资队伍建设、调整微格教学内容、增强微格教学互动性、建立健全监督机制等4个方面的教学改进策略。     

以导师制为核心的医学本科生科研能力的培养

就医学本科生科研能力培养的方法、意义及其目前亟待解决的问题作了初步探讨．提出了以导师制为核心的科研训练实践方式,讨论了影响科研训练效果的几个主要因素。     

留学生普通化学课程内容的选择与设计

结合留学生教学的实际和石油工程专业的特点,在原版英文教材的基础上对普通化学的课程内容进行了选择与设计。不仅在内容选择上尽量贴近留学生的接受水平和石油化工专业对化学知识的需求,而且在教学设计上采用易于留学生接受的由易而难、循序渐进的方式;同时为了激发留学生的学习兴趣,还加入了与石油化工领域相关的例子和拓展内容,使学生充分意识到化学与石油化工专业的紧密联系,引导留学生努力学好普通化学课程,为以后的专业学习打下良好基础。     

高中生化学思维品质发展现状研究

运用问卷调查、测试和访谈等方法, 分析研究了江苏省部分高中生化学思维品质的发展情况。结果显示: (1)高中生化学思维品质处于中等偏下发展水平, 且思维的批判性品质和独创性品质发展水平较低;(2)化学学习兴趣与学生的化学思维品质发展水平存在显著相关;(3)化学学业成绩与学生的化学思维品质发展水平存在显著相关;(4)男女生在化学思维品质发展水平上不存在显著性差异。     

化学专业师范生实践性知识水平及影响因素调查研究*

基于自主建构的化学师范生实践性知识水平研究模型,采用自编调查问卷,对河北某高校化学专业271名师范生进行问卷调查,运用SPSS 13.0数据统计分析软件进行数据处理,研究结论如下:(1)化学专业师范生在经过系统的理论学习之后,在实习之前,其实践性知识整体和各维度均处于本研究的中等水平;(2)化学专业师范生实践性知识的5个维度之间具有较强的相关性,各维度在一定程度上相互影响、相互制约;(3)教学经验的积累、大学之前的学习经历、自己敬重和喜欢的老师、优质课的观摩、教学案例分析、微格教学技能训练是影响化学专业师范生实践性知识的主要因素。     

基于大理科模式的化学拔尖学生培养的课程体系与教学实践

介绍南京大学大理科模式化学拔尖学生培养的课程体系和教学实践的初步成果,指出该课程体系的特点是系统地传授数、理、化、生等学科的基础知识,强化化学专业核心课程,尤其注重国际化教学与交流,学生适应化学及其相关交叉学科研究。     

Concept Development of Decimals in Chinese Elementary Students: A Conceptual Change Approach

The aim of this study was to examine the concept development of decimal numbers in 244 Chinese elementary students in grades 4–6. Three grades of students differed in their intuitive sense of decimals and conceptual understanding of decimals, with more strategic approaches used by older students. Misconceptions regarding the density nature of decimals indicated the progress in an ascending spiral trend (i.e., fourth graders performed the worst; fifth graders performed the best; and sixth graders regressed slightly), not in a linear trend. Misconceptions regarding decimal computation (i.e., multiplication makes bigger) generally decreased across grades. However, children's misconceptions regarding the density and infinity features of decimals appeared to be more persistent than misconceptions regarding decimal computation. Some students in higher grades continued to use the discreteness feature of whole numbers to explain the distance between two decimal numbers, indicating an intermediate level of understanding decimals. The findings revealed the effect of symbolic representation of interval end points and students' responses were contingent on the actual representations of interval end points. Students in all three grades demonstrated narrowed application of decimal values (e.g., merchandise), and their application of decimals was largely limited by their learning experiences.     

The Effectiveness of Process‐Oriented Guided Inquiry Learning to Reduce Alternative Conceptions in Secondary Chemistry

A nonequivalent, control group design was used to investigate student achievement in secondary chemistry. This study investigated the effect of process‐oriented guided inquiry learning (POGIL) in high school chemistry to reduce alternate conceptions related to the particulate nature of matter versus traditional lecture pedagogy. Data were collected from chemistry students in four large high schools and were analyzed using analysis of covariance. The results show that POGIL pedagogy, as opposed to traditional lecture pedagogy, resulted in fewer alternate conceptions related to the particulate nature of matter. Male and female students in the POGIL group posted better posttest scores than their traditional group peers. African‐American and Hispanic students in the POGIL group exhibited achievement gains consistent with Caucasian and Asian students. Further studies are needed to determine the value of POGIL to address achievement gap concerns in chemistry.