The interactive electronic whiteboard is different from the traditional whiteboard.
1. The combination of sound and picture, with pictures and texts, makes use of powerful functions to create vivid teaching scenes. Besides video linking and music playing, interactive electronic whiteboard has more functions that traditional electronic whiteboard does not have. For example, spotlights, masks, lenses, and operating tools have unique drag and drop functions, hidden functions, curtain pulling functions, coloring functions, and timely feedback functions. The combination of shape, color, sound, light, shadow and other elements makes the situation creation more vivid and appealing, which greatly stimulates students' interest in learning and urges them to actively participate in learning activities.
2. Multi-directional communication and interactive teaching provide more communication opportunities for teachers and students. The traditional teaching mode is one-way knowledge transmission, which is not conducive to students' creative problem solving. Teaching interaction includes communication, feedback, participation and many other aspects. The rich technical functions of interactive electronic whiteboard enable students to carry out related operations under the guidance of teachers, and also enable teachers to design various forms of teaching activities according to actual requirements. Teachers and students form a learning community, and teachers can participate in the communication between students more freely, capture the information generated in classroom teaching in time, adjust their teaching ideas at any time, and change learners' cognition through information exchange, thus producing effective learning effects.
3. Rich in resources, expanding space and providing students with vast resources. In traditional teaching, the organization of teaching resources has always been a time-consuming and laborious task for teachers. Even making the simplest PPT slides will cost teachers a lot of time and energy. Using the teaching resources provided by the electronic whiteboard link network, you can call out the materials and courseware collected by teachers at any time, or copy the PPT of courseware directly to students, so that they can continue their studies after class. You can even save the comments and modifications of key points and various new writing pages in the teaching process as PPT files through the saving function of electronic whiteboard. Not only teachers can modify the courseware in the future, but also students can have a deeper understanding of the teaching content through such PPT. This makes teachers more flexible, convenient and efficient in organizing resources.
Interactive whiteboard has limited function in current mathematics teaching.
1. The traditional teaching mode is difficult to change. Teachers mostly use PPT for demonstration and simple interaction, and the electronic whiteboard only plays the role of curtain. The traditional teaching mode is quite effective for students to master basic computing ability, logical operation ability and conventional problem-solving ability, and most math teachers agree with it. However, this model focuses on receptive learning, which is obviously insufficient to cultivate students' interest and innovative spirit, and can not continuously stimulate students' desire for learning. The electronic whiteboard only plays a low-level function, resulting in a waste of teaching resources.
2. The core function of interactive whiteboard-interactivity has not been brought into play. As an important resource platform for teachers' teaching, electronic whiteboard, as a teaching resource, solves the problem that teachers need to spend a lot of time making PPT slides and other courseware, so that teachers can use more resources of the same type. However, the core function of interactive whiteboard is interactivity. Only by designing various teaching activities, teachers can transform technical functions into teaching functions and provide more communication opportunities in the classroom, can interactive electronic whiteboard become a real "interactive media" between teachers and students, and students' thinking can be obtained.
3. Paying attention to new technology and neglecting teaching methods is not the real meaning of interaction.
Using the interactive whiteboard, we can easily translate, flip and unfold mathematical graphics, concretize, visualize and simplify complex mathematical problems, and make it easier for students to explore the fun of mathematics. However, if teachers blindly emphasize the interactive integration of new technologies and neglect to change and transform their teaching methods through interactive teaching, then the so-called interactive teaching is only an extension of traditional teaching.
Third, give full play to the three advantages of interactive electronic whiteboard in mathematics teaching.
1. Inspire students' learning motivation and interest by using the characteristics of illustrations and images. In the process of junior high school mathematics teaching, the requirements for abstract thinking have been improved, involving plane graphics, time and distance changes, complex calculations and so on. In the teaching process, using audio-visual means flexibly and effectively and creating intuitive and vivid scene lead-in skillfully can not only attract students' attention, but also stimulate students' interest in learning and desire for knowledge, make the situation creation more vivid and infectious, and greatly stimulate students' interest in learning, which not only improves students' sensory awareness, but also reduces students' interest.
For example, for the teaching contents of 1 1 kinds of unfolded diagrams in four kinds of cubes, traditional math teachers have spent a lot of time explaining the folded and unfolded contents. Because students are exposed to the space contents for the first time, they can't imagine the changes, so teachers have to help them understand by folding one or two solid papers prepared in advance. Now use the demonstration function of electronic whiteboard to teach, which is simple and clear, so that students can easily understand the different changes of 1 1. For example, when teaching trapezoidal area content, use electronic whiteboard to show students the whole process of area formula: draw a trapezoid on the whiteboard, and then copy, rotate and translate the trapezoid to make the two trapezoid into parallelogram. Students naturally observe that the area of the large parallelogram is twice that of the original small trapezoid, and thus derive the formula for calculating the area of the trapezoid. With the help of electronic whiteboard, students' thinking in images can be guided to transition to abstract thinking, which can reduce teachers' teaching pressure, break through the difficulties of teaching materials and effectively play the role of "the finishing touch".
2. Improve teaching efficiency by using instantly generated teaching resources. Using interactive electronic whiteboard, you can easily draw any figure and change the number axis, the shape of the figure and the slope of the line segment on the number axis in the teaching process, which is much more convenient than drawing a figure on the blackboard and more flexible than the figure set by multimedia courseware. In the next chapter of congruent triangles, there is such an exercise. Take any point D on the AB siDE of equilateral △ABC, so that ∠ CDE = 60, and the bisector of the outer angle of de intersecting ∠B is at e, (1), which proves that △CDE is an equilateral triangle; (2) When D is a point on the extension line of AB, does the conclusion still hold? If yes, please give proof; If not, please explain why.
Figure 1
Using the interactive whiteboard, the teacher drags point D along the extension of straight line AB. It is not difficult to find that △ECD always keeps the shape of an equilateral triangle during the movement. Because the graphics are constantly changing, students master not two isolated topics, but a kind of problems, which is conducive to a profound understanding and mastery of the problems. On the contrary, learning by traditional teaching methods requires drawing many figures separately, and then analyzing, judging and demonstrating, which is time-consuming and laborious and difficult to master. The use of multimedia courseware can only make students follow the teacher's preset ideas, which is not conducive to intuitively feeling the changes in graphics and can not effectively broaden students' thinking space.
3. As an important resource platform, interactive whiteboard can support teachers to use and utilize teaching resources more effectively. First, it is unrealistic to make courseware in real time according to students' questions in class when preparing lessons. Interactive whiteboard allows math teachers to use more resources of the same type, and realize real-time analysis and analogy of topics by using materials-based, open resource library graphics and exercises, which makes resource management more convenient and flexible, and can also improve students' ability to ask questions, analyze and solve problems. Secondly, when teachers and students encounter new problems and new ideas in classroom interaction, interactive whiteboard can save the dynamically generated resources in the classroom as teaching resources for teachers to recycle in the future, which is obviously different from traditional teaching resources. The instant generation and dynamic nature of resources is another innovation to improve teachers' teaching methods. For example, through the explanation and analysis in teaching, the degree of students' questioning and accepting knowledge can be used as an important reference for the progress and difficulty of teachers' lectures. If the whole teaching process in the classroom is collected into a video file, it will form a reference resource for math teachers, and can also be used to support the sharing of resources such as case teaching and diagnosis teaching.
With the rapid development of network and the continuous improvement of teaching mode, the classroom under the new curriculum standard is no longer a stage for teachers to display knowledge alone, but a platform for teachers and students to jointly generate and construct knowledge. In the process of the transformation from traditional multimedia linear teaching to interactive teaching mode, interactive whiteboard technology provides many new possibilities for school education, and also puts forward higher requirements for teachers' teaching design ability and teaching regulation ability. Let's seriously practice the new curriculum concept, better promote the use of whiteboard resources, optimize classroom teaching, effectively implement students' dominant position and promote the common development of students, teachers and schools.