Class three refers to "special delivery class", "famous teacher class" and "famous school network class", which is an important task put forward by the Ministry of Education to promote the integration and application of information technology and education and teaching, and to explore educational methods and teaching research models under the background of informationization.

There are many manufacturers offering three kinds of products, such as Ovia, Schiavo and Qu Rui, and they all have three kinds of solutions. As far as I know, Ovia has done a good job, relying on the recording and broadcasting equipment and platform independently developed for many years, supporting the school to carry out interactive live broadcast of teaching, research and teaching, and helping the balanced development of education. Baidu's products and services are relatively mature and there are many application cases, which can support the normal application of three classrooms.