关于常系数齐线性方程的基本解组

本文对常系数齐线性方程基本解组理论的论证给予了细致的补充。     

基础教育课程改革与学习方式转变

教会学生学习,促进每一个学生的发展是本次基础教育课程改革的一个重点。本文从学生进行创新学习的原因、依据和方法进行了探讨。列举了主动性学习、问题解决性学习、在计算机环境中学习、体验性学习、合作式学习、独特性学习等新型的学习方法。     

小学语言教育:情感态度和价值观的重要基石

新课标中对小学语言教育提出"通过语言形成情感态度、价值观"的要求。小学教师因此可能成为人一生中最重要的言语导师。提高教师素质,加强情感教育,建立良好的语言情境,是建立良好人生情感态度和价值观的重要条件和途径。     

Generalizing in the context of an early algebra intervention (La generalización en el contexto de una intervención algebraica temprana)

ABSTRACT

This study aims to understand the instructional interactions that foster students’ generalizing. By analysing video-recorded lessons from 13 different Grade 3 classrooms in which an early algebra intervention was implemented, activities related to generalizing and students’ generalizing activities were identified, and the nature of the relationships between these activities were explored. Namely, I consider the activities that potentially encourage students’ generalizing and the generalizing that students themselves do, and describe ways in which these activities interact. The findings have both practical and theoretical implications; in the former case, they provide insight into the design of instruction to foster generalizing, and in the latter case, they contribute to an ongoing conversation about students’ mathematics learning.     

Preparation of ultrafine γ-Al2O3 particles in non-ionic water in oil microemulsions

Ultrafine γ-Al₂O₃ particles are synthesized in Triton X-100/n-hexanol/cyclohexane/water water in oil(w/o) microemulsion by mixing two separately prepared microemulsions containing Al(NO)₃ and (NH₄)₂CO₃ respectively. The ultrafine Al₂O₃ particles are characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD) and their size and distribution are measured. The effects of water, surfactant and reactant concentrations on the particle size and distribution are studied. The results show that the particle size and distribution can be changed by varying the preparation conditions, and the size of the microemulsion droplets has a controlling effect on the size of the particles. A possible mechanism of ultrafine particles (UFPs) prepared by microemulsions is proposed.     

Equivalence and relational thinking: preservice elementary teachers’ awareness of opportunities and misconceptions

This study examined awareness of equivalence and relational thinking exhibited by 30 preservice elementary teachers in order to assess their initial preparedness to engage students in these two important aspects of early algebraic reasoning. Findings indicated that preservice teachers collectively demonstrated an awareness of relational thinking both in identifying opportunities offered by tasks to engage students in this thinking and in identifying this thinking in samples of student work. However, in proposing difficulties students might have with selected tasks, few participants demonstrated the understanding that many elementary school students hold misconceptions about the meaning of the equal sign. Implications of these findings for preservice and inservice teacher education are discussed.     

任务型教学法与3P教学法的理念依据及模式比较

在我国中小学英语教学中,有些人认为任务型教学法(Task-Based Language Teaching,简称TBLT)应取代3P(Presentation,Practice,Production)教学法,有些人则将任务型教学法视为3P教学法中的运用阶段。通过分析、比较两者的教学模式及理念依据可知,在我国特有的外语教学环境之下,3P教学法可操作性强、学生语法概念明晰等优势使其在中小学英语教学中仍有一定的用武之地。任务型教学法也有其自身的局限性及在我国的适应性问题。因此,我们不应全盘否定任何一种,而应根据教学实际,综合它们的合理内核,发展3P教学法,对任务型教学法进行本土化,使其为教学实践服务。     

五年制专科英语专业基础阶段听力技能的培养

本充分了解了五年制英语专业学生听力中存在的问题，提出在基础阶段(一、二年级)的听力教学中应从以下几方面培养学生听的能力：听辨音能力、词语掌握能力、语法运用能力、预测能力、复述能力及良好的心理素质。     

构建面向21世纪的基础教育价值观

教育思想制约和影响着教育实践和教育行为.教育价值观是教育思想的核心.为了创造出面向21世纪的新基础教育,建立新的基础教育价值观势在必行.本文从教育功能的变化、时代发展的需要和个体自我发展的需要角度对教育价值观进行分析和思考,提出了新的基础教育价值观应该定位在创新性上,并认为创新性是当今基础教育满足社会需要和个体需要协调平衡发展的最佳结合点和最佳途径.