FYI, for online teaching, according to my own experience, you will need the following if you run your own school:

a, a high quality program of study designed to meet the needs of students preparing for an exam.

b. to develop the teaching and exam resources you will use (textbooks, activities, etc.) combined with multimedia-based and interactive contents and include syllabus, textbook and activity as well as exam files.

c. You will also need a qualified, dedicated and organized faculty to teach and help students who reply in time.

d. If your online school also offers certification, you will need to make sure that you are partnering with other decent recognized institutions (e.g., in tertiary education this is normally recognized accreditation) to give the credentials you issue the necessary credibility and legitimate status..

Our school actually has done online teaching as well as ordinary teaching with students physically present in class.