高中化学开展“生动”课堂教学的实践——以“乙烯”教学为例

“生动”课堂即生动有趣、和谐活泼的课堂,让学生动起来的课堂。南宁市第一中学探索在高中化学学科实施“生动”课堂教学的有效路径,通过课前、课中、课后等三个教学阶段的生动设计,多措并举助力“生动”课堂的实施,帮助学生查缺补漏、巩固提升,从而不断提高学生的学习兴趣和学习参与度,发展学生的化学学科核心素养。

小学语文“生动”课堂文化的实践策略

在当前教育改革的大形势下,小学语文课堂教学的改革必须要重视课堂文化建设,创建一个“和谐、自主、多元、进取”的课堂文化,也就是“生动”课堂文化。这种课堂文化的内涵包括体验、多元和生长三大特点。在课堂教学中,“生动”课堂文化能够对学生们的学习效率造成积极的影响,为学生未来的发展打下坚实的基础。基于此,文章就主要围绕着小学语文“生动”课堂文化的实践策略展开相关研究,首先阐述了小学语文“生动”课堂文化概述,随后对小学语文“生动”课堂文化实践的影响因素进行了分析,最后提出了小学语文“生动”课堂文化实践的有效策略及途径,希望能够为相关教育工作者提供一定的理论参考。

小学语文“生动”课堂文化的实践策略

汉语是我国的母语,而语文学科是我们学习汉语的最主要学科,小学语文是小学阶段的基础课程,小学语文的教学效率不仅影响着学生今后的语文学习,还对学生其他学科的学习有着重要的影响,所以,提升学习语文教学效率就非常有必要。在小学语文课堂教学中,实施“生动”课堂文化教学能够有效提升学生的学习兴趣,促进小学语文教学效率的提升,小学语文教师应该注重“生动”课堂文化教学的实践,促进小学语文教学的发展。

基于深度学习的高中地理“生动”课堂构建

文章首先阐述了高中地理“生动”课堂的含义与特征,然后从教学情境创建、问题设计、课堂活动组织、课堂生成处理四方面入手论述了基于深度学习的高中地理“生动”课堂构建。

“生动的语文”:从个性到丰盈——我对教学主张的再认识

“生动的语文”教学主张于2017年提出。“生动”是对语文教学中教与学的状态的描绘,“生”意指“学生、生活、生命”,“动”意指“教学策略的灵动”和“教学评价的机动”。新课标更加强调“以学生的学习为中心”,“生动的语文”也应该对此有所呼应,从更多关注“教”,转向更多关注“学”:注重对学习目标的优先理解;想方设法在评价上证明目标是否抵达;借助“以学习为本”的设计思维,促使学生学有所成。这一转变,是教学主张从个性到丰盈的过程,也是积极面对新课标,迎接新课改,让教学变得更丰厚、更科学的过程。

从“理解目标”出发,追求“学得生动”——《小小“动物园”》教学与思考

四年级上册第二单元习作《小小“动物园”》的学习目标是从不同角度找到家人和动物之间的相似点,进行联想,把对家人印象最深的地方写下来。教学时,从“理解目标”出发,当堂全程教写:先让学生明白整节课要达成的目标,而后以绘本故事《我家是动物园》为支架,教学生学会以动物来类比人,过程中辅以动态的评价,不断激活学生的学习动力,实现学生生动地学,使课堂呈现生动有效的教学效果。

“生动的语文”:一种“学为中心”理念下的行动方案——有感于何捷老师的研究与实践

“生动的语文”是一种“学为中心”理念下的行动方案,不仅描绘了理想的教学样态,更铺设了达到这种理想样态的路径。它追求教与学的生动,让学生站在课堂的中央。而达成这一理想状态,需要从“学”的角度来思考“教”。

“生动的语文”的探索——以何捷老师执教的《刷子李》为例

何捷,福建省教育学院教研员、全国新作文写作联盟盟主、福建省语文学会小学专委会秘书长、福建省作协成员、福建省语文学科带头人。他的教学主张是“生动的语文”,以“生动的语文”促进“深度学习”,使儿童“乐友所学”,本文将从何捷老师的课例《刷子李》出发探索其教学中的“生动”,以期为一线小学语文教师的教学提供一些有益的参考。

创设“生动”课堂 发展模型观念

义务教育数学教学强调学生学习的主体地位,重视发展学生的核心素养.模型观念是义务教育阶段数学核心素养之一,其发展具有一致性、阶段性、整体性,根植于真实问题情境之中,强调学生主动参与数学活动过程.

课堂教学因“生动”而生动

新课改以来，高中思想政治课堂教学面貌发生了根本性的变化，但在“应试”压力较大的高三思想政治课堂中，“生冻”课堂仍然是一种常态。让课堂因“生动”而生动，是高三思想政治课教师共同的价值认同。“生动”课堂体现在“师生交响”的律动、“思维探索”的灵动和“人文关怀”的情动。“情境·问题·探究”的教学模式有着“情境触动”、“问题引动”和“探究互动”的“生动”机制，使课堂真正生动起来。

构建以生为本的生动生活课堂

构建“以生为本”激发学生兴趣让学生“动”起来的“生动课堂”和贴近学生实际的“生活课堂”。

Lecturers’Efforts in Building Rapport in the English-Medium Instruction(EMI)Context:Focus on the Use of Communication Strategies

Past studies reveal the prevalence of anxiety,coupled with low motivation and disengagement among students in English-medium instruction(EMI)programs.Given the detrimental impact these negative emotions can have on learning outcomes,it is imperative that teachers establish positive emotional rapport with their students.This study explores how experienced and highly rated EMI lecturers at a Chinese university’s overseas campus use communication strategies to build rapport with their students during interactive academic activities.It identifies the strategies used by these lecturers and examines how the strategies facilitate the teaching-learning process.The data,consisting of 10 hours of tutorials and 10 hours of supervisor-student supervision meetings,is analyzed using an adapted Conversation Analysis(CA)approach.The analysis reveals three types of communication strategies(CSs)frequently used by lecturers:back-channeling,codeswitching,and co-creation of messages.By employing these strategies,the lecturers established a strong rapport with the students,which created an encouraging and supportive learning environment.Consequently,this positive atmosphere facilitated students’learning of content knowledge through English.The findings of this study have implications for the training of lecturers who encounter difficulties in establishing rapport with multilingual students in the EMI setting.

Rate Law for Photoelectrochemical Water Splitting Over CuO

Photocatalytic splitting of water over p-type semiconductors is a promising strategy for production of hydrogen.However,the determination of rate law is rarely reported.To this purpose,copper oxide(CuO)is selected as a model photocathode in this study,and the photogenerated surface charge density,interfacial charge transfer rate constant and their relation to the water reduction rate(in terms of photocurrent)were investigated by a combination of(photo)electrochemical techniques.The results showed that the charge transfer rate constant is exponential-dependent on the surface charge density,and that the photocurrent equals to the product of the charge transfer rate constant and surface charge density.The reaction is first-order in terms of surface charge density.Such an unconventional rate law contrasts with the reports in literature.The charge density-dependent rate constant results from the Fermi level pinning(i.e.,Galvani potential is the main driving force for the reaction)due to accumulation of charge in the surface states and/or Frumkin behavior(i.e.,chemical potential is the main driving force).This study,therefore,may be helpful for further investigation on the mechanism of hydrogen evolution over a CuO photocathode and for designing more efficient CuO-based photocatalysts.

Ecological environmental quality evaluation and driving factor analysis of the Lijiang River Basin,based on Google Earth Engine

For regional ecological management,it is important to evaluate the quality of ecosystems and analyze the underlying causes of ecological changes.Using the Google Earth Engine(GEE)platform,the remote sensing ecological index(RSEI)was calculated for the Lijiang River Basin in Guangxi Zhuang Autonomous Region for 1991,2001,2011,and 2021.Spatial autocorrelation analysis was employed to investigate spatiotemporal variations in the ecological environmental quality of the Lijiang River Basin.Furthermore,geographic detectors were used to quantitatively analyze influencing factors and their interaction effects on ecological environmental quality.The results verified that:1)From 1991 to 2021,the ecological environmental quality of the Lijiang River Basin demonstrated significant improvement.The area with good and excellent ecological environmental quality in proportion increased by 19.69%(3406.57 km^(2)),while the area with fair and poor ecological environmental quality in proportion decreased by 10.76%(1860.36 km^(2)).2)Spatially,the ecological environmental quality of the Lijiang River Basin exhibited a pattern of low quality in the central region and high quality in the periphery.Specifically,poor ecological environmental quality characterized the Guilin urban area,Pingle County,and Lingchuan County.3)From 1991 to 2021,a significant positive spatial correlation was observed in ecological environmental quality of the Lijiang River Basin.Areas with high-high agglomeration were predominantly forests and grasslands,indicating good ecological environmental quality,whereas areas with low-low agglomeration were dominated by cultivated land and construction land,indicating poor ecological environmental quality.4)Annual average precipitation and temperature exerted the most significant influence on the ecological environmental quality of the basin,and their interactions with other factors had the great influence.This study aimed to enhance understanding of the evolution of the ecological environment in the Lijiang River Basin of Guangxi Zhuang Autonomous Region and provide scientific guidance for decision-making and management related to ecology in the region.

瞄准发展等级,追求生动形象

高考作文为了有区分度,使成绩优异的学生脱颖而出,为社会选拔出真正的人才,2000年高考大纲提出了两个等级:一个是基础等级,一个是发展等级。发展等级的第三条提出了“生动形象”的要求,并特意举出四点,一是善于运用各种表达方式,二是形象丰满,三是细节生动,四是意境深远。为了使学生写作时有法可依,便于具体操作,这里运用实例。

记叙文如何生动形象

自2000年起,《考试说明》对作文提出基础等级和发展等级两个标准,其中'生动形象'属于发展等级中的第二点要求,对其解说,2000年表述为'善于运用多种表达方式,细节生动,形象丰满,意境深远',2001年表述为'善于描写,记叙生动,形象丰满,意境深远'。到了2002年,'丰富'(材料丰富,形象丰满,意境深远)取代了'生动形象',原因是'生动形象'

“求真”视野中的“生动·大气”教育

吴江市实验小学在认真梳理学校发展历史、深入探究学校办学现状的基础上,提出了要办"生动·大气的教育",这一教育主张是对"求真"精神的生动践行。基于对"真"的哲学思考,认为教育"求真"应求规律之真,求现实之真,求可能之真;生动的教育是对现实之真的适度尊重,大气的教育是对规律之真的自觉皈依,"生动·大气"的教育是对可能之真的不懈追求。

我国大豆生产波动动因分析——基于省际面板模型的实证研究

在我国大豆生产波动频繁的情况下,找出影响大豆单产、种植面积的影响因素是实现“提单产、稳面积”的首要举措。研究采用1999~2020年21个省份面板数据,在分析大豆单产、种植面积的变化趋势基础上,根据大豆单产增减趋势,把大豆产区划分成增产区、减产区和波动区,采用改进的面板数据模型分别对三个产区的大豆单产和种植面积的影响因素进行实证分析。结果表明,机械化收割、产研结合、农药投入、小型拖拉机的投入是影响不同区域大豆单产的显著因素;机械化耕作是提升所有区域种植面积的显著因素,玉米种植面积、化肥投入、农药投入、灌溉条件、科研资金与人员投入、产研结合、机械化收割是影响不同区域大豆种植面积显著因素。根据分析,提出了相应政策建议。

Effect of Si on growth kinetics of intermetallic compounds during reaction between solid iron and molten aluminum

The effect of Si on the growth kinetics of intermetallic compounds during the reaction of solid iron and molten aluminum was investigated with a scanning electron microscope coupled with an energy dispersive X-ray spectroscope, and hot-dip aluminized experiments. The results show that the intermetallic layer is composed of major Fe2Al5 and minor FeAl3. The Al-Fe-Si ternary phase, rl/rg, is formed in the Fe2Al5 layer. The tongue-like morphology of the Fe2Als layer becomes less distinct and disappears finally as the content of Si in aluminum bath increases. Si in the bath improves the prohibiting ability to the growth of Fe2Als and FeAl3. When the contents of Si are 0, 0.5%, 1.0%, 1.5%, 2.0% and 3.0%, the activation energies of Fe2Al5 are evaluated to be 207, 186, 169, 168, 167 and 172 kJ/mol, respectively. The reduction of the activation energy might result from the lattice distortion caused by Si atom penetrating into the Fe2Al5 phase. When Si atom occupies the vacancy site, it blocks easy diffusion path and results in the disappearance of tongue-like morphology.

New Method to Restrain Pumping Voltage of Braking Procedure for Brushless DC Motor of Electric Armored Vehicle

In order to restrain the high pumping voltage of braking procedure which is harmful to the system of electric armored vehicle. Based on the analysis of pumping voltage of the braking procedure, the relation between pumping voltage and PWM ratio is derived and a new digital control method to restrain the pumping voltage by changing PWM ratio is put forward. Because the capacitance is decreased effectively, the volume of controller is reduced and the performance to price ratio is improved. The results of computer simulation and experiment proved that this method is feasible and valid.