The range of modern educational technology is very wide, and the training of primary and secondary school teachers must focus on the most effective educational and teaching content, that is, the so-called core content. Modern educational technology includes two aspects, one is the basic theory of modern educational technology-systematic scientific methodology, educational communication theory, learning theory and audio-visual education theory. The second is the theory of computer-aided instruction, which mainly refers to the information technology used in education. The author thinks that the emphasis of modern educational technology training content should be different according to different training objects. 1. The key content of modern educational technology training for new teachers should be basic theory. Because new teachers lack modern educational theory, we must attach importance to the training of basic theory of modern educational technology in the training of modern educational technology, which is the inevitable requirement of modern educational technology theory and practice. Theoretically, the basic theory of modern educational technology is the supporting point and basic theory of modern educational technology. Only by comprehensively and accurately understanding and mastering modern educational technology can we make good use of modern educational technology in education and teaching practice and produce obvious application effects. From a practical point of view, the practical experience and lessons of audio-visual education in China tell us that we must attach importance to the training of basic theories. In the previous audio-visual education and training, we often paid little attention to the training of basic theory, but focused on the training of media operation and using technology, which led to the new teachers' incomplete and profound understanding of audio-visual education, and then produced some wrong understandings, which affected the development and goal realization of audio-visual education and had a negative impact on its position in education. In the basic theory of modern educational technology, learning theory should be one of the key points of training. In fact, any education and teaching activities are carried out around students' learning. Only by mastering students' learning mechanism and making the education and teaching process conform to students' learning rules can education and teaching activities be the most effective and cultivate students' all-round quality to the maximum extent. Facing the requirements of 2 1 century for people's quality, the traditional teaching mode and teaching method dominated by behaviorism learning theory can no longer meet the needs of cultivating talents in the new century, while the constructivist learning theory based on cognitive learning theory can better reflect the requirements of quality education in 2 1 century. Therefore, it is necessary for new teachers to deeply understand and understand the constructivism learning theory in training. At the same time, the study of constructivist learning theory can effectively promote the change of teachers' educational ideas and concepts, change the "teacher-centered" teaching mode and actively explore the new "student-centered" teaching mode, which can better help new teachers understand the role of educational media as an educational information carrier in students' learning activities and change the past practice of using educational media as an auxiliary teaching tool to build new knowledge for students. In the basic theory of modern educational technology, teaching design has the most direct influence on teaching practice. Instructional design is not only a theory, but also a technique for new teachers. Applying the principle of instructional design to teachers' teaching practice can obviously improve the teaching level and teaching effect of new teachers. In contemporary society, the unprecedented development of science and technology has injected a lot of new information into education, provided some new media and put forward new requirements for the goal of education. The educational process has become a veritable systematic project. Just as the premise of an excellent construction project must have an excellent engineering design, an excellent classroom teaching must also be carefully designed. Only on the basis of systematic scientific methods and advanced teaching concepts and theories, and in accordance with the principles of teaching design, can the teaching process be optimized. Therefore, new teachers must master the principles and methods of teaching design in training. 2. Multimedia CAI for the aged teachers is an important part of modern educational technology training. Because older teachers generally feel difficult about computer technology, network technology and multimedia technology, and multimedia CAI should be based on computer education technology. Only by letting old teachers accumulate some experience in computer education technology through the practice of computer education technology can they really use multimedia CAI and really play its role. Because multimedia technology can fully embody modern educational viewpoints and ideas and meet the requirements of quality education, it has also been strongly advocated by educational experts and educational administrative departments, and is known as a "commanding height" of education in 2 1 century. Therefore, multimedia CAI has become an important symbol and the most dynamic part of modern educational technology. Therefore, for old teachers, multimedia CAI is the key content of modern educational technology training. Understand question 3. What is the standard to measure whether a school has applied modern educational technology? When introducing the school's achievements in applying modern educational technology, a principal introduced in detail the purchase of first-class educational and teaching equipment, multimedia classrooms and high-grade teaching software in various subjects. So does the school really apply modern educational technology? In other words, what is the standard to measure whether a school has applied modern educational technology? The author thinks that material conditions are the basis to ensure the application of modern educational technology, but the application of modern educational technology not only pays attention to the configuration of equipment and whether the teaching software is high-grade, but more importantly: 1. Teaching staff and educators should study how to use modern educational technology, explore and construct a new teaching model, formulate a plan to implement the new teaching model, and give full play to the functions of advanced equipment. Only in this way can we really improve the teaching efficiency and quality. 2. Organize teachers to develop and apply teaching software. Only through teachers' personal teaching experience and painstaking research and development of teaching software can the greatest integration effect between teachers and students be exerted.