Short Stories with Tragic Endings

I am in a classroom at college and the teacher is my high school freshman science
teacher. A mix of friends from high school and from college are in my class. We are
working on something then class ends and I leave. I don't remember what happened
after that. The next thing I remember I am back in the classroom and it is time to turn
in the assignment and the teacher is not satisfied with my work and decides to fail me.
I protest but the dream ends and I go into my next dream