Maybe while high, but there's nothing better in the world than a big bowl and a textbook for comprehension/retention. I've never retained more information in my academic life then when I was studying high.
What is this studying thing you're talking about? One time instead of studying for my philosophy final exam I went to New Orleans and partied hardy. Weed, booze and mescaline. I made it back just in time for my 8 AM exam. It was an essay. Since it was philosophy it was bullshit anyway. I made an A.