The main purpose of teachers' real-time teaching system is to increase the sense of presence and improve the learning effect. At present, online education institutions in China mainly adopt advanced two-way, real-time and interactive systems. Communication network is the main transmission platform, and video conference system based on H320 protocol is the main terminal equipment. Organize learning by establishing remote multimedia classrooms in various places.
Students' autonomous learning system is one of the advantages of online education. Teachers' real-time teaching requires students to attend at a certain time. Due to time constraints, the learning style is not very flexible. Many educational institutions provide students with autonomous learning systems, including network-based multimedia courseware and database-supported information retrieval systems. These systems are carefully designed and made by teachers or specialized personnel to meet students' reference and supplement in learning.
The separation between teachers and students in online education, evaluation feedback system is produced in order to know students' learning situation in time and solve students' confusion in the learning process. The communication between teachers and students is mainly realized by synchronous tools, such as chat system and telephone, and asynchronous tools, such as email and BBS.