Ive been in this EXACT same situation and having just graduated from high school and being a smoker of the sacred herb for some time now i think i can offer you some sound advice. As a high school kid, it is NOT worth getting high and letting it ruin your education. I'm the biggest stoner i know but I'm also the most responsible i know. Being responsible doesnt mean you're not a stoner, it just means that you know how to balance marijuana with your actual life. ALWYAS remember that Marijuana was put on this earth to enhance the lives of men, not enslave them. Let herb enhance your life, don't let it BE your life and DONT be irresponsible with it. its too great a thing to be toyed around with, especially by kids. Not to call you a kid or anything but you are still in high school. If you find that you can't stop yourself from smoking when bud is available, then you have a problem. (most teenagers do, which gives marijuana a bad name and gives people excuses to make up lies about it.)

I'm a responsible, respectable, hard working marijuana smoking adult who can control himself. I love bud but man, take it from me, its not worth ruining your grades over. Those grades determine college, college determines career, career determines salary. salary determines LIFESTYLE and your DESTINY. do you really want those 2 things changed because you decided to get high instead of finishing your book report??? anyways man, good luck and never stop toking. Hope that helps you out.