Nightmares about the school.

These types of nightmares are the ones that are usually accompanied by feelings of frustration, and generally appear when something goes wrong. As when we feel that our knowledge and experiences are not enough to face a situation, so that we do not know what to do or how to do to face things, for example:

When in the nightmare we fail the grade or the exam, case in which it warns us that an exam will be more difficult than we had thought, or that soon we are going to face a difficult matter that will require more effort and study than we believed. Another case is when in the nightmare we are kicked out of school, which is when we realize how important school is and we wish we could go back or have made better use of it, which is usually a prompt to update our knowledge or take a course, as we will need it soon.