Chances are that there will be at least a few people in your world who will receive an education. This is an important aspect of worldbuilding that you should think about because the groups of people who receive an education in a society is indicative of the form of society most prominent in your world. For instance if only rich people higher up in terms of social standing get any form of education a stratified society or a caste system is the predominant form.
There are multiple forms of education. If only a few people get educated in your world there will not be people specifically trained to teach. Because of this most of their education will come through self-study with the help of tutors. If everyone at least gets a chance to be educated there will be people who go to school to learn how to teach and there will most likely be lower levels of schools than University/College.