I have dreams where I am back in high school, in a class. During the dream, I then remember that I not only graduated from high school, but also from college. That is when I get up, leave the class, and walk the halls of the school, trying to leave.
I have similar dreams where I have to do something again at my current age that I’ve already done such as high school, Air Force Officers Training School, etc...all decades in the past.