试谈多媒体技术在课堂教学中的作用.docx

多媒体技术是一种新的系统集成手段，它把比较成熟的图像处理技术、声音处理技术、视频处理技术以及三维动画技术，统一地集中到计算机平台上。在课堂教学中，教师通过多媒体技术向学生传递信息，学生利用多媒体向教师反馈学习信息，实现教师、学生、教材之间的信息交往，完成教学目标。在这种新颖的情景中学习，学生必将大大提高学习兴趣，注意力更为集中，从而有效提高学生的学习效率。一、利用多媒体技术可激发学生的学习兴趣在多媒体这样的交互式学习环境中，学生可以按照自己的学习基础、学习兴趣来选择自己所要学习的内容，选择适合自己水平的练习，可以进行个别化学习，也可以和同学协商讨论。电脑像学习伙伴一样和学生进行讨论、交流。学生在这样的交互式学习环境中改变了传统教学中接受知识灌输的被动状态，有了主动参与的可能。按照认知学习理论的观点，人的认识不是外界刺激直接给予的，而是外界刺激与人的内部心理过程相互作用产生的。因此，必须调动学生的主动性、积极性，才能获得有效的知识。这种主动参与性为学生主动性、积极性的发挥创造了很好的条件，使学生乐于学，善于学，真正体现了学生的认知主体性。二、利用多媒体技术可优化教学情景多媒体技术有三个显著特征：第一，信息媒体的多元化，并且是建立在数字化处理的基础上的；第二，多种技术的系统集成性，基本可以说是包含了当今计算机领域最新的硬件技术和软件技术；第三，处理过程的交互性，即实现了复合媒体处理的双向性。这种结合使得多媒体技术和课程教学两者相得益彰，能产生珠联璧合的效果，从而使传统的教学产生质的变化。多媒体辅助教学的优越性主要表现在以下几个方面：第一，多媒体技术能将文字、图表、声音、动、静图像集成在一起，构成教学软件，产生极佳的逼真效果，使内容更充实、更形象、更具有吸引力，从而提高了学生的学习热情和学习效率。第二，多媒体技术和数据库技术相结合，提高了辅助教学综合利用多媒体信息的水平。多媒体技术和网络技术相结合，使多媒体辅助教学系统可以让学生和学生之间，学生和教师之间跨越时空限制互相交流，可以使每一个学生能够同时拥有几乎无限的信息来源接口，从而扩大了知识面，提高了分析问题和解决问题的能力。第三，学生学习如同视频游戏。精心设计的多媒体教学系统深受同学们的欢迎，这一点从其面部表情便可得到证实。相比之下，学生昏昏欲睡地坐在教室里，听着教师单调的讲授，抄写黑板上的内容作为笔记，简直枯燥至极。第四，多媒体环境可以使教师用更多的时间去接触每一个学生，也有更多的时间考虑如课程设置等其他方面的问题。多媒体技术也使因材施教成为可能。学生的自主学习使得教师将更多的时间花费在其他工作上，如教师可以有充分的时间进行自我知识的更新，掌握最新科技动态，搜集教学素材，等等。只有教师的素质提高了，才能满足高质量的教学工作的需要。三、利用多媒体技术可创设理想的学习环境，促进学生自主学习教育理论认为，人们的学习既不是外部事物的简单呈现，也不是人的原有认知结构的展开，而是人在与外部事物相互作用的过程中逐步对外部事物进行意义建构。它强调学生对知识的主动建构过程，强调学生学习的自主性和创新性。建构主义学习理论认为“情景”“协作”“会话”和“意义建构”是构成学生自主学习的四大要素。即强调学生在一定意义情景中对所学内容进行意义建构，针对某主题的不同任务进行分工协作，使每个学习者的研究成果在学习集体中共享。在进行意义建构的过程中学生始终处于主体地位，通过主动搜集和分析材料、数据，对所学习的问题提出各种假设并努力加以验证，最后在教师的指导下，在与同学的讨论中，得出正确的结论。四、利用多媒体技术教学值得注意的问题现代多媒体技术的使用情况，在一定程度上反映了一所学校的教学水平，这在课堂教学中尤为明显。多媒体技术虽然有利于教师发挥其聪明才智和特长，有利于学生学得生动活泼，有利于提高教学质量。但是，无论什么样的教学设施，都不过是教师提高教学效率的辅助手段而已，代替不了教师的主导作用。教师在使用的过程中要根据不同的教学目的、教学内容和教学方法的需要，将其纳入自己的教学过程中，使其成为整个教学活动的有机组成部分。选用课件的目的要明确，使用的时间、方法和步骤都要预先设计好，写到教案上。教师上课前要周密调查，避免在上课时出现差错或故障，影响学生的学习兴趣，达不到理想的教学效果。对那些现成的课件，不能照搬，要结合本班本校的实际情况，与演示文稿或其他电教手段结合起来使用。课件的画面切忌过于复杂，底色不要太花哨。此外，还要选择相匹配的背景音乐。这样才能主次分明，以便更好地发挥学生的主体作用和教师的主导作用，从而达到预期的教学目标。总之，课堂教学过程也应是教师和学生信息交流的过程。教师应选择能够快速展示多种信息的传播手段，按照事物的整体逻辑分层次地将教学信息整体输出。教师除了用教科书等传统载体以及手势、眼神外，还要大胆运用多媒体技术。具有高速准确、直观清晰、存储量大、动静结合等特点的计算机辅助教学软件，日益受到广大教师的青睐。Multimedia technology is a kind of new system integration method, it brings more mature image processing, voice processing, video processing technology and 3 d animation technology, uniformly on the computer platform. In classroom teaching, the teacher to students through multimedia technology transfer information, students use of multimedia to teachers feedback information, to achieve information communication between teachers and students, teaching material, complete the teaching goal. In this study new situations, students will greatly improve the learning interest and attention more concentrated, thus effectively improving the students learning efficiency.One, the use of multimedia technology can arouse students interest in learningIn the multimedia and interactive learning environment, students can according to their own learning, learning interest to choose what they want to learn the contents of the, choose suitable for their level of practice, can undertake individualized learning, can also be discussions with your classmates. The computer as a study partner and students to discuss and exchange. Students in the interactive learning environment changed state to accept knowledge passively in traditional teaching, with active participation of the possible. According to the views of cognitive learning theory, the understanding of the people not directly give the stimulation, but the outside stimulation internal psychological process of interaction with people. So we must mobilize students initiative and enthusiasm, to achieve effective knowledge. This play of the active participation of students initiative and enthusiasm have created good conditions, to make the students happy to learn, good at learning, really reflect the students cognitive subjectivity.Second, the use of multimedia technology to optimize teachingMultimedia technology has three characteristic: first, the diversification of information media, and is built on the basis of digital processing; Second, a variety of system integration technology, basic is contains the latest hardware technology and computer and software technology; Third, the process of interaction, namely the biphasic composite media processing. This combination makes the multimedia technology and course teaching complement each other, both can produce the effect of collaborations, so that the traditional teaching to produce qualitative changes.The superiority of multimedia assisted teaching is mainly manifested in the following aspects:First, the multimedia technology can be text, graphics, sound, dynamic and static images together, constitute the teaching software, excellent realistic effect, make the image content is richer, more and more attractive, and improve the students learning enthusiasm and learning efficiency.Second, combining multimedia technology and database technology, improve the level of comprehensive utilization of the auxiliary teaching of multimedia information. Combined with multimedia technology and network technology, the multimedia auxiliary teaching system can make between students and students, between students and teachers to communicate with one another across time and space limit, can enable every student to have almost unlimited source of information interface at the same time, thus expanded aspect of knowledge, improve the ability to analyze and solve problems.Third, the students to learn like a video game. Carefully designed multimedia teaching system is popular among the students, this from their facial expressions can be confirmed. Students, by contrast, drowsy sitting in the classroom, listening to the teacher the monotonous teaching, copying the contents on the blackboard as notes, is boring.Fourth, can make teachers use multimedia environment more time to contact each student, also have more time to consider other issues such as the curriculum. Multimedia technology has also made it possible to their aptitude. Students autonomous learning makes teachers will spend more time on other work, such as teachers can have sufficient time to self knowledge update, to master the latest developments in science and technology, to collect teaching materials, and so on. Only to improve the quality of teachers, to meet the need of the high quality of teaching.Three, use of multimedia technology can create an ideal learning environment, promote the students autonomous learningEducation theory is that peoples learning is not the simple external things, nor the original cognitive structure, but in the process of interaction with external things step by step the external things of meaning construction. It emphasizes the student to the knowledge actively constructing process, emphasizing the students learning autonomy and creativity. Constructivism learning theory is that scene and collaboration session and meaning construction are the four elements of students autonomous learning. Emphasizes students in a certain scene content being studied in meaning construction, different tasks for collaboration on a certain topic, the research achievements of each learner to share in the collective learning. In the meaning construction process of middle school students has always been in a main body position, through active materials, collect and analysis data, puts forward assumptions on the issue of learning and work hard to verify, finally under the guidance of teachers, in discussion with classmates, draw the right conclusions.Four, the use of multimedia technology teaching problems worthy of attentionThe usage of modern multimedia technology, to a certain extent, reflects the teaching level of a school, this was especially true in the classroom teaching. Although multimedia technology is beneficial to teachers to play to their talents and special skills, help students learn more lively, to improve the teaching quality. However, no matter what kind of teaching facilities, is merely a means for teachers to improve teaching efficiency, cannot replace the teachers leading role.Teachers in the process of use according to different teaching objectives, teaching content and teaching method, incorporating them into their own teaching process, make it become an organic part of the whole teaching process. Choose to clear the purpose of courseware, the use of the time, method and steps are designed in advance, writing teaching plans. Teacher before class to thorough investigation, to avoid some mistakes or failure during class, affect the students interest in learning, to reach the ideal teaching effect. For those who are ready-made courseware, cannot copy, combined with the actual situation of our school, our class and combined using powe