Keywords: digital library; Electronic lesson preparation; Mathematics teaching effect; Interest in learning; Mathematical literacy
First, the use of digital library resources to improve the efficiency of lesson preparation
Interest in learning plays a very important role in students' mastery of knowledge. Today, when we fully understand the subject of learning, we all know that the effect of classroom teaching is not what the teacher instills, but whether the students like learning. Mathematics is a highly abstract subject, and how to stimulate students' interest in learning is a problem that mathematics teachers should attach great importance to in the teaching process. For primary school students, although the significance of learning is well known, psychological age determines students' learning characteristics, so it is more important to rely on teachers' classroom teaching art, that is, how to combine the characteristics of primary school mathematics and adopt effective teaching methods according to children's age characteristics to stimulate and cultivate students' interest in learning mathematics. Therefore, teachers should consider the interest in learning when preparing lessons for students. In the past, due to the lack of resources and time constraints, teachers should make more efforts on the issue of "attracting interest" in primary school mathematics teaching. [1] First, using riddles and stories to organize teaching for primary school students, especially those in Grade One, often rack their brains to design interesting questions, with little effect. Sometimes they have been collecting on the Internet for a long time, and sometimes they find that they have been charged, which wastes precious time and basically has to find their own way. And our digital library can solve this problem well, which contains a lot of good materials, including teaching design and courseware. Some can be used directly, and some can be modified slightly. The most important thing is that these resources are directional and can be searched directly according to grade and time, and the content can be closely combined with the teaching materials. It is the lesson preparation that designs the form of using riddle stories to organize teaching, which can stimulate students' interest in learning. For example, when preparing the lesson "Understanding in Seconds", the teacher first found the material of a riddle: "You can walk without legs, but you can tell us when to get up and when to go to bed." There is also a story about how a child cherishes time and develops good life and study habits according to four illustrations in the book. This gives certain materials for preparing lessons. It solves the problem of lesson preparation design to improve students' interest in learning.
Second, the use of digital library resources to improve classroom efficiency
Multimedia Computer Aided Instruction (MCAI) is the product of the combination of computer multimedia technology and CAI technology in 1990s, and it is an important symbol of modern education. [2] As an important part of digital library, it is a new type of library that uses computer multimedia technology to compress the images, characters and sounds of traditional media into digital information, and then carries out virtual storage, dissemination and reception through network communication technology. Its resource database contains not only a large number of written materials, but also a large number of audio and video files, which plays an important role in teaching.
It is the rational use of resources that makes teaching scenes more vivid, promotes the diversification of teaching forms, cultivates students' subjective consciousness of autonomous learning, and fully optimizes classroom teaching efficiency. Students can't help but participate in learning activities and learn new knowledge in a pleasant learning atmosphere, which adds vitality to boring math classes, so that students can truly experience "happy" learning and are willing to put more energy into cooperative learning math activities. [3]
For example, the teaching of the first-grade textbook "Understanding RMB" used to be limited by many factors such as venues and teaching AIDS, which often made students swallow dates, making it difficult to solve practical problems in life with the knowledge in the textbook. It always fails to achieve the expected results. I found a shopping courseware in the resource library this time. Courseware creates a "virtual supermarket" situation and uses the network to let students do "online shopping". The students are so excited that they can't wait to become online "customers". According to the computer, students can act as salespeople or "customers" themselves, spend money on shopping freely, plan and use their own money, and their enthusiasm for learning reaches a climax. This kind of teaching enables students to learn not only teaching knowledge, but also life knowledge, as well as online browsing and online shopping knowledge, which urges each student to closely connect what they have learned with real life through the network, shortens the distance between the content of teaching materials and life experience, improves students' ability to solve practical problems, increases their talents and promotes their spirit of independent exploration. After a class, the students are still not satisfied, which greatly improves the classroom teaching effect.
Third, the use of digital library resources to improve students' mathematical literacy
Education reform must be implemented through teaching reform, and mathematics teaching occupies a considerable proportion in the process of students' basic education, so mathematics teaching reform should be highly valued. [4] At the beginning of the reform, the question we asked was "What to change", and now our answer is "Change ideas and strive to improve students' mathematical literacy". "The so-called literacy refers to quality and accomplishment. Mathematical literacy belongs to the comprehensive thinking form of epistemology and methodology, and has the cognitive characteristics of conceptualization, abstraction and patterning. Students' mathematical literacy is formed, and the teaching efficiency is naturally improved.
In the process of students' epistemology and methodology gradually forming, in addition to the guidance of teachers, students' own learning has an impact on themselves, which can be realized through the platform of digital library.
(A) the use of digital library platform to stimulate students' independent exploration spirit.
Constructivist learning theory holds that students' learning is not a process of passive absorption, repeated practice and strengthening memory, but a process of active construction on the basis of students' existing knowledge and experience. In other words, only through students' active participation, active exploration and continuous discovery can mathematics teaching structure be truly accepted by students as a cognitive structure. [5] Therefore, in the process of mathematics teaching, teachers should be the organizers, promoters, providers and supporters of network resources. When guiding students to acquire knowledge, we should provide them with concrete, vivid and vivid practical materials, stimulate their desire for knowledge and guide them to consciously participate in the exploration process. For example, when teaching the problem of "chickens and rabbits in the same cage", because it is a very old math problem, students have certain learning ability. In order to further cultivate students' independent inquiry literacy, I arranged a self-study task, and the students asked at that time, which book did the teacher have this knowledge and where can I buy it? Yes, a series of questions stumped me and the classroom became lively. Some recommend Book City, some say they have read stories, and some … Because of the developed network, how to find books now? This is a child's voice, "teacher, don't we have a library?" Suddenly, the classroom was quiet. Yes, in front of the children, I opened the digital library and entered "the problem of chickens and rabbits in the same cage" Several books, including some publishing houses, have information, and children's eyes are discerning. I can't wait to rush to the library now. Later, I was moved beyond words when I saw children holding various versions of books to discuss this issue. On this platform, as long as there are difficult problems or materials that need to be found, they can be easily solved, avoiding the opportunity of screening through online search and being deceived by bad websites, dispelling the worries of teachers and parents that children will not surf the Internet, and being able to conduct self-study well.
(B) the use of digital library platform to cultivate students' practical ability
Real life is the destination of learning mathematics. In teaching, teachers should pay attention to provide students with more practical opportunities, guide students to observe and understand things around them with a mathematical eye, guide students to solve practical problems with their own mathematical knowledge, and make students realize the role of mathematical knowledge in real life and the connection between mathematical knowledge and real life in practical activities, so as to cultivate students' mathematical consciousness and practical ability. [6]
Create a practical environment and cultivate students' ability to solve problems. Practice is a form of practice and a necessary condition for students to firmly master basic knowledge and formal skills. In order to let students understand, master, consolidate new knowledge and broaden their thinking, I follow the principle of "reproducibility-discovery-creativity" of knowledge, and guide students to find their own learning materials in the library, because in the digital library, many students have carefully designed and produced graded practice courseware integrating words, graphics, animation and sounds, so that students have enough time to try to answer independently and get feedback from all kinds of students through network computers. Students can also consolidate their knowledge in the game, killing two birds with one stone.
For example, when teaching "Calculation of Triangle Area", we use the "Geometer's Sketchpad" in the digital library to provide students with an opportunity to do "mathematical experiments", so that students can make two identical triangles by themselves, and then use the "translation" and "rotation" functions of the Geometer's Sketchpad to make two identical triangles into parallelograms, and then guide students to actively explore, observe, discover and discuss the areas of alternating triangles.
(C) the use of digital library platform to stimulate students' innovative thinking
The essence of innovation is creativity. It tries to break away from convention, be unconventional, and boldly question and explore. Cultivating students' innovative consciousness is the starting point and destination of modern education, and it is an urgent task facing classroom teaching at present. To cultivate students' innovative spirit, teachers must strive to reform teaching concepts and methods, make full use of the integration of information technology and subject courses in classroom teaching, constantly create conditions, create a good thinking atmosphere, let students have a broad thinking space, and let every student devote himself to innovative activities under the correct guidance of teachers. For example, when teaching more complicated travel application problems, you can find some resources in the digital library, such as courseware that vividly shows the state of motion with multimedia technology, whether it is relative or opposite, whether it starts at the same time or successively, whether it meets or is separated, and so on, such as math application problems; The distance between Party A and Party B is 800 meters. Xiaoming and Xiaohua come from the opposite directions of Party A and Party B respectively. Xiaoming walked for 2 minutes before Xiaohua set off. As we all know, Xiaoming walks 45 meters every minute. They met a few minutes later. In order to let the students know their movement state more clearly, I use the courseware in the library's resource library to display the line drawings with a distance of 800 meters between A and B on the screen, then let them stand in the positions of A and B, and then let Xiao Ming exercise for 2 minutes first, and then flash them out with blue light to mark two 45 meters. Then, demonstrate that Xiao Ming in Obana started at the same time, and the images of them approaching at the same time appeared on the screen, and asked the question "What is the distance of their simultaneous departure?" Ask the students to observe and answer. Then demonstrate it step by step. When they start at the same time, everyone walks on the screen for one minute, and the computer flashes and freezes to get the speed and sum. After reading the vivid images on the screen, students actively think and use their imagination with great interest, and soon find out the way to solve the problem. With intuition and bold innovation, they put forward a variety of ideas to solve problems, and their imagination and thinking ability have been developed and improved, and their creativity and innovation consciousness have also been cultivated. If mathematics literacy is not improved, students will naturally form their own drawing ability and problem solving ability.
In a word, the digital library integrates library literature information resources, network resources, equipment resources, software resources, resource library resources, intellectual resources and other resources, providing a broad space for our teaching and convenient conditions for students' learning. Applying many functions of digital library to our teaching can effectively improve our teaching efficiency. Effectively integrating library resources with our teaching will optimize students' mathematics learning process, which will often get twice the result with half the effort.