well ill tell you a little something........i went to college to re-take my GCSE's in england..........i was taking my mock tests for my science papers........but b4 i took them i had smoked abit wiv a few friends..........my results came thru and it showed that i done well when i smoked, i got like 13/20, 15/20, 12/20 and etc.....but the other mocks i did which woz a different day, i didnt smoke.....guess wot my results 4 them were........8/20,7/20,9/20........u tell me if smoking weed messes up your head?

ive jus proven myself that it helps ya think alot better.

peace.