Traditional teaching emphasizes from near to far, from shallow to deep, from concrete to abstract. Its model is based on teachers' teaching and divided into subjects. It is a didactic teaching and a collective activity, which completely ignores the uniqueness of students' personality and development. As monopolists and imparting knowledge, teachers often group students according to age and grade, carry out "mass production", and evaluate students' learning quality with test scores. The students trained by this model can't meet the needs of the information society.
The advanced audio-visual system of modern educational technology makes teaching more intuitive, makes complex things simple and makes abstract things concrete. With the support of network technology, we can not only enlarge time and space, but also narrow time and space, and vividly present things that distant students have never seen before.
In addition, the rich shared resources of modern educational technology make the content of classroom teaching rich and colorful. Teachers are no longer limited to preparing lessons alone and teaching with previous knowledge and experience, but make full use of the excellent knowledge and experience of all mankind to make the teaching content really keep pace with the times, fully meet the needs of students at different levels, and make interactive learning, inquiry learning and cooperative learning possible. Teaching no longer pursues the only correct answer as before, but fully develops students' personality and cultivates students' innovative consciousness and thinking by seeking common ground while reserving differences.