Briefly describe the main classification of teaching media.

A: After years of development, great changes have taken place in teaching media, and there are also different classification methods, mainly as follows:

(1) According to the development history of media, it can be divided into traditional media (such as language, books, etc. ) and modern media (such as radio, tape recorder, TV, video camera, video recorder, MP3, mobile phone, etc. ).

(2) According to the forms of media, it can be divided into printed media (such as books and magazines) and electronic media (such as tape recorders, cameras, projectors, televisions and computers).

(3) According to the development of media technology, it can be divided into the first generation media (the simplest technology such as language and books), the second generation media (that is, media that transmit information by analog signals, such as tape recorders and radios) and the third generation media (that is, media that transmit information by digital signals, such as language repeaters and MP3/P4). ) and the fourth generation media (that is, media that transmit information through metawire network technology, such as multimedia mobile phones, handheld PDA, etc.).