[Retracted] Building English Audio-Visual and Oral Mobile Teaching System Based on Virtual Augmented Reality Technology

Table 4

Use case description of teachers applying for courses.

Use case name	Teachers apply for courses
Range	Use of teacher application course module
Level	User purpose
Major participants	Teacher
Relevant personnel and concerns	Concerns of relevant personnel
	Teachers hope to correctly submit their applied courses and apply for open courses
Preconditions	Teachers can log in to the system correctly and legally
Guarantee of success	All correct data can be saved in the database.