Contact your local education authority or college to find information about the current art syllabus for standard levels of education for your target students. Knowing what is contained in the art syllabus will serve as an essential guide to establish what should be contained within your own art course; the information will also help your teachers and it will ensure that a prospective student will be provided with the art education he expects to receive from your art course.
Shadow other art teachers in your research to be able to observe how teachers teach art to a class. Record your observations regarding teaching methods and course content to be able to pass this information on to your course teachers. Ask to view a teacher's lesson plans and photocopy the notes, provided permission has been given. This will help you devise similar lesson plans. Visit various schools or colleges to be able to compare and contrast different aspects of course content and teaching methods.
Read books on teaching art practice, as well as reading about art techniques and art history in general, as part of your research. Gathering varied research material will provide a useful spectrum of lesson ideas, as well as a choice of teaching perspectives for you to adopt a teaching method that best suits your art school.
Research other online art courses to check out the competition. See what types of art courses they offer and how they deliver their art courses to be able to help you to devise your own art courses.
Type up your course structure based on your research and distribute your course booklet to your course teachers. Give a detailed account of the aims and objectives of the course, the art modules contained within the course and give clear instructions for teachers on how to teach the art courses.