Let me just say this:

I was always a smart kid, never really tried hard in public school, only did it like 15 times from grade 7-8. But in grade 9 I started smoking everyday and became VERY lazy. My marks started to slip and I just didn't give a shit.

But I'm now in grade 11, smoke the odd time maybe once a week, and I have initiative and its as though I can do anything if I put my mind to it. My average is around 86% and I can still do better but if I did that I probably wouldn't have a social life.

Smoking heavily does effect your intelligence but not in a long-term way. Smoking regularly can give you initiative and yes it does expand your imagination. Usually when I'm high I think about my future and how I'm going to get there or even about spirituality and all that. Fuck it's trippy as fuck thinking about that stuff.