All you have to do is take brokes. Smoke a day. Then dont do it four a couple of days. your lungs will repair them selves and if you practice concentration skills on Math problems and other things you wont lose an ounce of ability to learn. I take all AP and honors courses and have an above 4.0 GPA, but i smoke once a week during the school year, and almsot everyday during the summer.

Get Profane Motherfucker in here. Hes smart as hell and is studying for some degree in Math apparently. He says he smokes everyday too. He'll tell you where its at.