混合式BOPPPS教学模式的Scratch编程教学设计

Scratch是一款由麻省理工学院开发的可视化编程软件。随着在线教学的蓬勃发展,针对融合“线上”+“线下”的Scratch教学需求增多的问题,研究通过课前、课中、课后三个环节展开教学活动,将混合式BOPPPS教学模式应用于Scratch教学,旨在提高学生的课堂参与度、学习深度、学习效果,以及实现良好的师生互动。本研究以主题为《植物大战僵尸》的Scratch教学为例进行教学设计,以此验证该教学模式的效果,并提出了针对该教学模式的建议,为广大教师提供参考和借鉴。

基于项目学习法的初中Scratch编程教学探索

随着信息技术与人工智能的飞速发展,编程能力逐渐被教育界所重视。因此,该文将Scratch编程教学引入七年级信息科技课堂,将项目学习法融入Scratch编程教学活动,最后以生活实例项目“班级投票器”的设计与制作为例,对基于项目学习法的教学活动进行教学设计,并对教学设计效果进行总结与评价。

小学阶段爱国教育与Scratch编程教学实践研究

为改善传统思政课堂上爱国教育形式单一、学习枯燥、无法与现实相互联系,以及缺乏学科之间融会贯通的现状,学校以爱国精神为主题,结合教学理论将Scratch编程融入爱国教育课堂当中,使两者紧密结合融会贯通。实践证明,这种教学模式可以进一步推动信息化教育的普及,弘扬素质教育“以人为本”的精神,在教学过程中不仅能提升教师整体素质,还能激发学生爱国主义情怀和对Scratch编程的兴趣,可达到事半功倍的效果。

例谈Scratch游戏教学对学生计算思维的培养——以苏教版信息技术教材五年级上册第7课《穿越迷宫》为例

游戏教学法是儿童编程教学中最常用的教学方法,契合儿童的心理特征。计算思维是信息科技学科要培养的核心素养之一,也是学生在信息社会中学习、生活必备的基本能力之一。苏教版信息技术教材中介绍的Scratch软件是一款非常适合儿童学习的图形化编程软件。教师在课堂教学中可以结合游戏化教学理论,通过“玩—析—创—展—拓”五个步骤,让学生经历问题界定、抽象、建模、优化、迁移的思维过程,从而培养学生的计算思维。

Scratch软件辅助初中物理教学初探——以“浮力产生的原因”为例

针对“浮力产生的原因”这一教学难点,利用Scratch软件设计了仿真实验平台。该仿真实验平台具有可以显示物体大小、浸没在液体中的物体上下表面的压力大小、浮力大小等功能,学生可以直接从平台中读取实验数据,从而充分理解“浮力产生的原因”。利用该平台进行辅助教学,让“浮力产生的原因”这一抽象的知识变得形象。另外,学生还可以在仿真平台的搭建过程中复习和巩固相关的物理知识及原理。

基于项目式学习的小学Scratch编程教学策略研究

信息技术素养是国家基础教育的必要素养之一,编程教学也是信息技术教育的主要教学内容。Scratch平台作为目前最受欢迎的少儿可视化编程软件,目前被学校和教育工作者大量采用。通过项目式学习,学生可以在实际问题背景下,掌握Scratch编程教学所需的知识和技能,并利用这些知识和技能解决问题,从而全面提升其解决现实问题的能力。目前小学Scratch编程教学现状中仍存在许多问题,未能达到良好的教学效果。因此,探究基于项目式学习在小学Scratch编程中的策略研究具有重要的理论价值与实践意义,为小学Scratch编程的推广教学提供参考。

Scratch在初中数学教学中的应用

初中数学实验教学,实际上就是用实验的方法,帮助学生更好地理解数学课本中的抽象知识,提高学生的数学学习效率和数学成绩.中学数学实验教学是近年来兴起的一门新课程,在教学方法上,与其他课程相比,还存在着一定的差距.随着云计算和人工智能等新兴科技的快速发展,人们越来越关注孩子们的编程能力.Scratch是一款易于操作、多表征、动态互动、实时反馈的可视化教学软件,已成为开展少儿编程教学的首选.Scratch在初中数学教学中的应用,能够对数学学科教学和学生个体发展产生积极的作用.如何将Scratch与初中数学教学进行有效的结合,是我们需要积极探讨的问题.本文从当前中学数学学科教学存在的问题出发,从Scratch的特点出发,分析Scratch与中学数学课程整合的重要性,并讨论将Scratch与当前的课程整合的方法,并用实例来阐述,给学生提供思路.

Scratch编程为教学提供新思路

在信息科技时代,为提升学生计算思维、培养数字化学习与创新能力,将信息科技与小学数学进行融合,激发学生的学习兴趣,提高学生在课堂上的学习效率,探讨运用数学知识提升小学生编程能力,通过课前导入、课堂学习、课后延伸和学习评价等方面的探讨,Scratch编程为教学提供了新思路。

合作学习法在Scratch编程教学中的应用--以“猜猜我是谁”一课为例

随着编程技术的不断发展和普及,编程课程已经成为中小学教育中不可或缺的一部分。在初中阶段,编程课程的教学逐渐变得更加深入和系统化。在编程教学环境中,合作学习已经成为一种非常重要的教学方法。本文从笔者自身教学经验出发,从合作学习的定义、优点以及如何进行合作学习等方面,通过具体实践案例提出方法及思考。

基于Scratch编程的小学生计算思维能力培养措施

信息技术的快速发展,对基础教育事业产生了巨大的影响,人们逐渐意识到培养学生计算思维能力的重要性,开始在Scratch编程中培养学生的计算思维能力。随着新课改的有效落实,教师要重视培养学生的计算思维能力,帮助学生构建完善的知识网,掌握更多的学习方法;教师要以学生实际情况为前提,设计丰富多彩的编程教学内容来吸引学生的注意力,激发他们的想象力,不断提高学生的计算思维能力,提升信息技术素养,为深入学习夯实基础。

Scratch在小学信息科技教学中的应用

Scratch是最简单的编程软件,学生接受度高,助学价值丰富。教师在小学信息科技教学中引入Scratch软件,需要对教材内容作深度研究,精选教学案例、创新教学设计、优化教学流程、组织教学交流、延伸教学实践,为学生创造适合的学习环境,成功激发学生主动探索的热情。教师针对学生学习需求展开创新探索,能够为学科教学带来更多的动力支持。

以Scratch程序设计教学搭建学生计算思维的“金字塔”

本文以2022年版《义务教育信息科技课程标准》中所述的信息科技课程的四个关键能力之一——计算思维的提升为主导线索,依托于小学五年级的Scratch教学内容,总结出了小学阶段在计算思维培养上需要重视的四个基础元素(亦即培养目标):分析与抽象能力;做出逻辑判断的能力;进行优化与迭代的能力;建模与应用的能力。本文以计算思维的四个基本要素为目标,根据多年的课堂实践,积累总结出Scratch课堂教学中有效培养学生计算思维的教学模式:分析设计抽象-编写修正逻辑-反思迭代优化-归纳应用建模,通过有效的教学模式,搭建学生计算思维的“金字塔”。

Molecular dynamics simulation of the material removal in the scratching of 4H-SiC and 6H-SiC substrates

Single crystal silicon carbide(SiC)is widely used for optoelectronics applications.Due to the anisotropic characteristics of single crystal materials,the C face and Si face of single crystal SiC have different physical properties,which may fit for particular application purposes.This paper presents an investigation of the material removal and associated subsurface defects in a set of scratching tests on the C face and Si face of 4H-SiC and 6H-SiC materials using molecular dynamics simulations.The investigation reveals that the sample material deformation consists of plastic,amorphous transformations and dislocation slips that may be prone to brittle split.The results showed that the material removal at the C face is more effective with less amorphous deformation than that at the Si face.Such a phenomenon in scratching relates to the dislocations on the basal plane(0001)of the SiC crystal.Subsurface defects were reduced by applying scratching cut depths equal to integer multiples of a half molecular lattice thickness,which formed a foundation for selecting machining control parameters for the best surface quality.

Scratching and Turning Experiments on Machinability of Optical Glass SF6 in Diamond Cutting Process

To improve the machinability of optical glass and achieve optical parts with satisfied surface quality and dimensional accuracy, scratching experiments with increasing cutting depth were conducted on glass SF6 to evaluate the influence of cutting fluid properties on the machinability of glass. The sodium carbonate solution of 10.5% concentration was chosen as cutting fluid. Then the critical depths in scratching experiments with and without cutting fluid were examined. Based on this, turning experiments were carried out, and the surface quality of SF6 was assessed. Compared with the process of dry cutting, the main indexes of surface roughness decrease by over 70% totally. Experimental results indicated that the machinability of glass SF6 can be improved by using the sodium carbonate solution as cutting fluid.

基于Scratch作品相似度的检测研究

Scratch作为图形化编程中的热门课程吸引了广大中小学生,而对于学生所做的作品与标准作品之间差异性的评定通常是靠教师通过人工对比检查,对于教师不仅工作量大且耗费巨大精力,因此对于Scratch作品相似性的识别就可以辅助教师快速检测学生作品,从而提高教学效率。针对该问题,提出Siamese-BERT模型对两个Scratch作品之间的相似度进行检测。首先,对Scratch源文件进行解析提取原始积木块序列,根据积木块逻辑特征提出一种积木块重构算法,将原始积木块序列排序成Token序列,将Token序列作为CBOW(Continuous Bag of Words)模型的输入文本进行预训练,从而得到Scratch的词向量模型;再使用Siamese神经网络框架结合BERT(Bidirectional Encoder Representation from Transformers)模型组合训练,最终输入到余弦相似度函数进行相似度计算。数据集来自于长沙市Scratch培训机构的培训作品和学生的练习作品,在该数据集上,Siamese-BERT模型准确度能达到0.82,对比其它的文本相似度模型,Siamese-BERT模型在Scratch作品相似度检测上更加准确。

Sex Differences in Scratching Behaviors Induced by Intradermal Injections of Pruritogenic Chemicals in C57BL/6 Mice

Pruritus is an individual unpleasant sensation of human sensory nervous system. In the physiological condition it excerts a self-protective mechanism to protect the skin against external harmful agents. Pruritoceptive itch is also a major symptom of skin disease and a common reason for consulting a dermatologist in clinic. It has been well known that both histamine-dependent and histamine-independent pathways mediate acute and chronic itch sensations. Previous studies have showed common neural pathways partially shared by itch and pain sensation, and significant sex differences in pain sensation. However, sex difference in itch sensation has not been given too much attention as the majority of itch studies were done in male mice or rats till now. In the present study, we compared the scratching behaviors induced by pruritogenic agents in male and female C57BL/6 mice. The results showed that both males and females exhibited scratching behaviors in response to the intradermal injection of histamine-dependent and histamine-independent pruritogenic chemicals. Moreover, the number of scratching behaviors in response to compound 4880 and chloroquine were significantly higher in females. These results suggested that sex differences occured in histamine-dependent compound 4880-induced and histamine-independent chloroquine-induced itch sensations, but not in histamine-independent SLIGRL-NH2-induced itch sensation.

21 CASES OF HERPES ZOSTER TREATED BY SCRATCHING METHOD WITH THREE-EDGED NEEDLE

In recent 2 years, the author used a three-edged needle to scratch the vesicles for treatment of herpes zoster and obtained good therapeutic results as reported in the following. General Data 21 cases were observed in this series, including 12 males and 9 females, with ages ranging from 4 to 72 years. The shortest disease course was 1 day and the longest. 2 weeks. Clinical Manifestations There were 15 cases with groups

Scratching by pad asperities in copper electrochemical-mechanical polishing

Low dielectric constant materials/Cu interconnects integration technology provides the direction as well as the challenges in the fabrication of integrated circuits(IC) wafers during copper electrochemical-mechanical polishing(ECMP). These challenges arise primarily from the mechanical fragility of such dielectrics, in which the undesirable scratches are prone to produce. To mitigate this problem, a new model is proposed to predict the initiation of scratching based on the mechanical properties of passive layer and copper substrate. In order to deduce the ratio of the passive layer yield strength to the substrate yield strength and the layer thickness, the limit analysis solution of surface scratch under Berkovich indenter is used to analyze the nano-scratch experimental measurements. The modulus of the passive layer can be calculated by the nano-indentation test combined with the FEM simulation. It is found that the film modulus is about 30% of the substrate modulus. Various regimes of scratching are delineated by FEM modeling and the results are verified by experimental data.

浅谈如何在小学信息技术Scratch编程中培养学生的思维能力

计算思维是教师引导学生自主运用学习工具解决实际问题的创新实践思维活动。随着Scratch编程在小学信息技术中的广泛应用,如何简洁、高效地培养学生的计算思维已成为当前信息技术教学的重点研究课题,而“双减”政策的实施为教师提供了教学改革的契机。文章指出,教师应结合信息技术学科的特点,有针对性地培养学生的信息素养与计算思维。教师应从小学生的思维形式、学习方法、计算能力三个维度出发,融入生活化教学情境为学生创设趣味教学场景,利用Scratch编程提高信息技术课堂教学的有效性。

在Scratch编程教育中培养学生计算思维的探究与实践

文章首先介绍Scratch的特点与优势,其次阐述在Scratch编程教育中培养学生计算思维的内涵及重要性,最后提出在Scratch编程教育中培养学生计算思维的实践策略,旨在提高学生的编程能力和计算思维能力。