It depends on what I'm working on. Smoking before class is generally a bad idea, but smoking while brainstorming and outlining unleashes creative potential. I am very moderate in my use and it has relieved my stress so that I can prioritize effectively. I don't go to school baked (unless I'm sick, I use it like cold medicine or whatever) but I use regularly and sometimes while doing homework. I've excelled in graduate studies at selective schools for almost ten years now. The key is moderation and knowing your own limits.