What If Schools Prepared You For Surviving Nightmares, Not Exams?

Imagine, instead of walking into math or english class, your schedule says something like this:

Period 1: How To Escape A Collapsing Dream

Period 2: Facing Shadow Creatures 101

Period 3: Lucid Dreaming Defense Training. 

Instead of report cards, you would get ranks for survival. Instead of homework, you have to practice staying calm when the nightmares start getting too real. 

Maybe, in this world, people could force you into a nightmare. You could travel between dreams. And for tests? Teachers might assign you a dream you have to survive. A dummy. Where if you fail, you wouldn't die, unlike a real one. 

Maybe detentions would be nightmares you have to fix. 

So, would you dare to sleep in this world? Never knowing what you might have to face? 

 All scenarios described are fictional and purely imaginative.