After the 20th century, with the development of modern science and technology, modern technologies such as slide show, projection, film, recording, video recording, radio and television have been widely used in education, which has expanded the scope of educational and teaching activities and improved the efficiency and quality. From 65438 to 0974, the United States launched the first "practical technology satellite" dedicated to teaching, marking the development of modern educational technology to a new stage.

Since then, people have further discussed the new topics brought by the latest achievements of computer, microelectronics and optical fiber communication to the development of educational technology.

Extended data:

Characteristics of educational technology:

Educational technology is not the general application of a certain teaching method, it includes the theory and practice of three concepts (learner-centered, relying on resources and using systematic methods) that are comprehensively applied to education and teaching. Educational technology attaches importance to the analysis and research of learners' characteristics, because learners' situation directly affects many educational decisions, such as choosing goals, determining the rhythm and determining the nature of evaluation.

In educational technology, solving problems depends on developing and utilizing learning resources, promoting personalized learning and improving people's learning quality. Learning resources include information, personnel, materials, equipment, skills and environment, which is a complex system. In order to make them produce overall functions and play an excellent role in learning, it is necessary to realize the optimal combination through system design.

Therefore, it involves a series of educational development work, effective teaching resources development and effective teaching process design.

Educational technology attaches importance to the development, application, management, design and learners' learning experience of all learning resources or learning media called human beings, and emphasizes the scientific and systematic method to analyze and integrate the process of "teaching and learning".

For example, teaching activities are designed in a systematic way. Through demand analysis, content analysis and learner analysis, operable progressive learning goals are formulated, and appropriate strategies are selected according to these learning goals, thus forming a complete teaching and learning design scheme, which is evaluated and summarized in the trial, and necessary adjustments and modifications are made as needed.

This systematic process provides a way to optimize teaching activities.

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