初中历史学案导学教学应用浅谈

对导学案中的学案导学的应用谈一些看法,主要从现状和优化两方面谈起。     

导学案有效运用的几点体会

导学案运用达到高效性就要做到:有效备课,合理编写导学案;发布学案,心案导学;典例精讲,疑点点拨;当堂达标,检测效果;学案检查,及时到位,把导学案发挥出最大作用,以提高学生成绩,发展学生能力。     

试论学案导学的本质及其对教师教育的启示

作为一种新型教学模式,学案之"学"是指学生的学习起点以及确定这种起点的过程;学案之"案"既可指师生共同制定的以文本形式呈现的学习资源,也可理解为预先制定的学习程序;导学之"导"是学案导学的核心,最能确证教师身份;导学之"学"则是学习的终点以及走向这个终点的实践过程。学案导学教学模式在追求全人发展的同时,能够彰显教学自由,引导教育回归本真,对于重构教师知识观与教师教育观,完善教师教育实践具有重要意义。     

初中生物学案导学教学模式的构建

"学案导学"是一种新型的教学模式,是适应当下新课改的要求发展起来的一种教学模式。教师应根据学案导学模式的特征与作用,结合初中生物学科的特征,探讨初中生物学案导学教学模式的构建。     

学案导学的三重判读

学案导学的理想追求是少教而会、精教而能;教学合一、教育同体;因材施教、共同发展。但在实践运作过程中却意外地产生了困学难学、无学非学;弱教少教、散教懒教;强者更强、弱者越弱等问题。事实上,学案导学实践过程当中所折射出来的问题仍是学校教学理论的基本问题,即由学校观决定的教学观、由教学观主导的师生观、由师生观规训的职业观及其教学行为问题。而其根本则在于辩明以教导学、以教促学的学案导学基本教学原理,以材导学、以案促学的学案导学基本操作规则;力促师生两类教学主体个体自主性、尽责性的发挥与基于主体自觉性的教、学、材三边互动。     

以学论教,以案为导——浅谈高中信息技术教学导学案的设计

学案导学充分体现了新课改的精神,以学案为载体,导学为策略,通过教师的引导与学生的自主学习相结合,真正提高高中信息技术教学的实效性。本文中,笔者结合自己的教学经验,从"以生为本,以学论教"的思想出发,谈了几点教师在高中信息技术课的学案设计中应遵循的原则,以供同行借鉴。     

精编化学学案,彰显四个功能

化学学案的四个功能为:导学、导教、导练、导思。     

关于初中历史导学案使用的一些思考

"学案导学"教学法是一种新型的教学模式,它旨在通过学生的自主学习,培养学生的自学能力,提高教学效率,使学生变被动学习为主动学习,真正成为学习的主人。但是导学案的使用既不是对传统教学的否定,又不是练习册,大家在使用时不能以学案代替教师的"教"、学生的"学"。如何科学合理地使用导学案,使其真正成为提高学生成绩的有益途径是每一位教师应思考的问题。     

导学案使用误区

从五个方面简单阐述了导学案使用的误区,以引起教师在教学中使用导学案的注意。     

浅谈“学案导学”教学模式的实效性

随着新课改的不断发展,学案导学"教学模式"作为一种新的教学模式呈现在广大教师面前。基于该种教学模式的实效性,谈了观点。     

青春 责任 梦想 行动 2015年千名青年环境友好使者夏令营侧记

<正>"我们处在世界正在发生重大变革的时代,中国也正在实现着民族伟大复兴的关键时刻。青年人要承担什么责任?""我们应该团结更多的青年人,向全社会积极宣传环保理念,保护我们共同生存的家园。"一名青年使者刚刚回答完贾峰主任的问题,全场响起的是掌声——雷鸣般的掌声!8月17日,2015年"千名青年环境友好使者夏令营"在成都市温江区正式开营。环境保护部宣传教育中心主任贾峰亲临现场,并为青年学子们讲授了热情     

Asbeste Arten,Entstehung, Bedeutung,Problematik

Types of asbestos are distinguished not only by structure, chemical compositon, shape of aggregates, and length and quality of fibers, but also by its formation. Though consisting of quite common elements, deposits are formed only under very special conditions. Its unique combination of properties has created over 3000 fields of application (about 70% in asbestos cement). Great efforts have been made to substitute all types of asbestos by harmless, similarly cheap and versatile synthetic fibers, owing to the unquestioned carcinogenic properties of all asbestos dusts. However, development of such fibers has not made any remarkable progress until recently. Consequently risk to workers in mining and manufactoring, consumers, outsiders, and the environment should be kept as low as possible by intensifying precautions and diminishing emissions.     

Effect of CaO on retention of S, Cl, Br, As, Mn, V, Cr, Ni, Cu, Zn, W and Pb in bottom ashes from fluidized-bed coal combustion power station

This work was conducted to evaluate whether Ca-bearing additives used during coal combustion can also help with the retention of some other elements. This work was focused on the evaluation of bottom ashes collected during four full-scale combustion tests at an operating thermal fluidized-bed power station. Bottom ashes were preferred to fly ashes for the study to avoid interference from condensation processes usually occurring in the post-combustion zone. This work focused on the behaviors of S, Cl, Br, As, Mn, V, Cr, Ni, Cu,Zn, W, and Pb. Strong positive correlations with CaO content in bottom ashes were observed（for all four combustion tests） for S, As, Cl and Br（R = 0.917-0.999）. Strong inverse proportionality was calculated between the contents of Pb, Zn, Ni, Cr and Mn and CaO, so these elements showed association to materials other than Ca-bearing compounds（e.g., to aluminosilicates, organic matter, etc.）. Somewhat unclear behaviors were observed for W, Cu, and V. Their correlation coefficients were evaluated as statistically ＂not significant＂, i.e., these elements were not thought to be significantly associated with CaO. It was also discovered that major enrichment of CaO in the finest bottom ash fractions could be advantageously used for simple separation of elements strongly associated with these fractions, mainly S and As, but also Cl or Br. Removal of5% of the finest ash particles brings about a decrease in As concentration down to 77%-80% of its original bulk ash content, which can be conveniently used e.g., when high As content complicates further ash utilization.     

意大利的金枪鱼、箭鱼、鸬鹚以及家燕等体内的多氯萘、多氯联苯、多氯二苯-p-二恶英、多氯二苯并呋喃以及p,p''''-DDE

我们曾对从意大利收集的金枪鱼、箭鱼、普通鸬鹚以及家燕体内的p,p'-DDE、多氯联苯同类物(PCBs)、多氯二苯-p-二恶英(PCDDs)、多氯二苯并呋喃(PCDFs)以及多氯萘(PCNs)浓度进行过测量.     

The monitoring,Evaluation, reporting,verification, and certification of energy-efficiency projects

In this paper, we present an overview of guidelinesdeveloped for the monitoring, evaluation, reporting,verification, and certification (MERVC) ofenergy-efficiency projects for climate changemitigation. The monitoring and evaluation ofenergy-efficiency projects is needed to determine moreaccurately their impact on greenhouse gas (GHG)emissions and other attributes, and to ensure that theglobal climate is protected and that countryobligations are met. Reporting, verification andcertification will be needed for addressing therequirements of the Kyoto Protocol. While the cost ofmonitoring and evaluation of energy-efficiencyprojects is expected to be about 5–10% of a project'sbudget, the actual cost of monitoring and evaluationwill vary depending on many factors, including thelevel of precision required for measuring energy andGHG reductions, type of project, and amount of fundingavailable.     

Algorithmen,gehirne, computer

In order to say something substantial about the fundamental limits of machines (especially of computers) and of human calculations, we must explicate the concept of algorithm. Such an explication is provided by the Turing machine. Thus, problems have been discovered which cannot be solved algorithmically. For other problems there are problem-solving procedures, but no elegant algorithms. That men are fundamentally superior to machines has not been shown as yet.