化学教学“研究性学习”探讨

研究性学习方法具体落实在化学教学过程中,体现出教学形式的愉乐化、教具制作的科学化、板书设计的合理化、课后作业的能力化.     

空间信息系统支持下的三峡库区土地利用时空变化分析

论文利用近50年来长序列统计资料对赤峰市耕地动态变化进行了研究，结果发现：1950年-2000年赤峰市耕地总量经历了3个增长期和2个减少期；耕地变化除具有以全市总量变化为代表的普遍特征外，南部和中北部具有明显的区域差异，主要表现为，50年来，与中北部各旗（县）相比，以敖汉旗为代表的南部3旗（县）耕地相对变化率较小，但1961年-1990年耕地减幅较大；通过文献调研和定量研究得知，50年来赤峰市耕地变化主要受5次大的政策因素驱动，并与人均国内生产总值、总人口、年末牲畜存栏总头数、粮食单产和人均粮食占有量等人口和经济发展因素显著相关。     

比较文学教学的四个关键词

比较文学作为一门学科,内容丰富、学理性强。如何使学生真正了解比较文学学科的价值、意义,使他们正确运用比较文学原理、方法,深入开展文学研究,四个关键词至关重要,即：比较;影响;可比性;变异性。学生只有充分了解关键词的含义,切实掌握了关键词的运用,比较文学的教学才能收到事半功倍的成效。     

二溴羧基偶氮胂催化光度法测定水中痕量锰

研究了在NH_3．H_2O-NH_4Cl 介质中锰催化 H_2O_2氧化二溴羧基偶氮胂褪色的最佳条件。λ_(max)=565nm，表观摩尔吸光系数为2．6×10~4 L·moL~(-1)·cm~(-1)，线性范围为0～2．1 μg/25 mL。用于水样中痕量锰的测定，结果满意。     

一种基于服务质量的网格服务发现机制

网格服务体系结构的出现对网格服务发现提出了挑战,UDDI上基于关键词和简单分类的服务发现机制已经不能很好满足需要.本文在分析现有相关研究的基础上,提出了基于服务质量的网格服务发现机制,引入服务质量相似度的概念,为网格服务发现提供了一种有效可行的方法.     

Pedagogical practices of NetNZ teachers for supporting online distance learners

A supportive online learning environment entails teachers using effective pedagogical practices to meet the needs of their students and developing a positive teacher–student relationship to foster learner motivation and engagement. This paper reports a study investigating how 32 secondary teachers in New Zealand taught their online distance classes and how they related to their students. These classes were administered by NetNZ, an online distance education community. An online survey conducted in 2016 found that NetNZ teachers used inquiry-based practices including flipped learning and knowledge-building pedagogies to support agency, autonomy, collaboration, and community development. They also used synchronous and asynchronous communication technologies to overcome barriers of relationship building in online settings. NetNZ was unique in delivering distance education in the New Zealand context in that it used a community approach to encourage a more active participation of its member schools and teachers in delivering distance courses to secondary students.     

The Reflection-Informed Learning and Instruction to Improve Students’ Academic Success in Undergraduate Classrooms

Abstract

This study addressed the role of the reflection-informed learning and instruction (RILI) model on students’ academic success by using CourseMIRROR mobile system. We hypothesized that prompting students to reflect on confusing concepts stimulates their self-monitoring activities according to which students are expected to review their understanding, search for related knowledge, and try to identify the confusing concepts. With this student-reflection information, instructors can thus address students’ difficulties effectively, which can lead to enhanced academic success. We tested our hypothesis by conducting a semester-long quasi-experimental study in undergraduate industrial engineering classes (N?=?153). The analyses revealed that students in the RILI condition performed significantly better than students in the control condition (Cohen’s d = .82). In addition, reflection analysis showed that both quality and quantity of reflections were significantly associated with exam performance. Surveys indicated users highly valued the RIFI model; they rated CourseMIRROR favorably and said they would continue to use it in future classes.     

Metaphors we’re colonised by? The case of data-driven educational technologies in Brazil

ABSTRACT

This article discusses issues concerning the spread of data-driven educational technologies in Brazil. Here, as elsewhere, educational technology continues to be promoted optimistically as the bearer of a panacea for historically-rooted social problems. Whilst some of these technologies have indeed contributed to important widening-participation programmes in the last two decades, widespread advocacy of technological ‘solutionism’, reflected in gradually stronger policy demands for efficiencies to be improved through ‘innovation’, has supported a relentless marketisation of the country’s educational systems. As transnational corporations position themselves to take control of key areas of these systems, threatening to restructure the whole sector, data-driven educational technologies provide the latest example in a series of ‘new’ ideas offered in an ever-expanding market. Based on the notion of ‘conceptual metaphors’, which encapsulate specific ways of perceiving, thinking and relating with the world, this article examines key metaphors underpinning discourses surrounding data-driven educational technologies in Brazil. In particular, the article analyses ways in which these specific metaphors may be promoting perspectives that ignore difference and obscure broader questions concerning education, thus contributing to the reproduction of previously existing problems and supporting new forms of colonisation.