I've had the dream many times. Usually it is also in a classroom that I never had a class in. You usually know all the classroom doors and which are your classes. I'd say 90% of the time, it is my English class I have this dream about and I go in thinking I'm gonna fail since I missed about 6 weeks of classes. Maybe it is because I think now I'm getting older and I'm starting to lose some grammar skills. I start questioning how to spell words, etc. that I always have known how to spell. I also believe it has to do with feelings of "failure" in life or some job or hobby you do that you beat yourself up about.
This dream is also usually accompanied by the "I can't find my locker" or "I can't remember my locker combination" which is followed by remembering the locker combination and marveling that I "still remember it after all these years"
This dream is also usually accompanied by the "I can't find my locker" or "I can't remember my locker combination" which is followed by remembering the locker combination and marveling that I "still remember it after all these years"