Modern educational technology and educational technology are the same major. Audio-visual education is the predecessor of educational technology. Educational technology mainly studies the application of teaching design and teaching media, and finally achieves the optimization of teaching effect. Therefore, multimedia is mainly used in educational technology, and audio-visual education can be summarized as educational technology. Informatization education is the main content of modern education and the trend of education development.

To sum up, audio-visual education, educational technology and modern educational technology can be said to be a major, audio-visual education is a part of educational technology, and information education can be classified as educational technology-distance education.

I don't know if you know this.