depends on the class.....
if its math, fuk no. I cant even pay attention sober!
but if its writing.....hell, i got an A in my screenwriting class last semester. I would write the craziest in-class assignments, turn them in, forget what i wrote the next day.....the prof would tell me i did GREAT, and to read it out loud in class.
Luckily, i was high everytime i read out loud. That helped me to avoid thinking ~WTF!~ at my own writing 
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