Technical secondary school level can fill in educational experience above middle school, and university is the key. College students who are studying can fill in the time as the day of filling out the form, and rest assured that VO has read countless forms and will understand them in seconds and will not be misunderstood.
You can refer to the instructions on the right for the courses you study in middle school, such as: academic, all required courses, etc.
I hope I can help you!