It's definitely helped me. I'm a sophomore at community college, right now my GPA is 3.6 and I usually smoke before I go to class. I was diagnosed as having Attention Deficit Disorder (ADD) When I was way younger and for the first few years of elementary school, I was on medication to help me pay attention. After middle school, I was pretty much able to control it on my own, but it was really hard. I didn't really start smoking before school until I started going to college because I didn't want it to affect my grades in high school.

So far It's been helping a lot with paying attention. When I smoke, I feel a lot more interested in the topics at hand and I retain the information way better. Plus, If I smoke before we have a test, I tend to be way more careful and take my time. When I don't smoke, I rush through and occasionally miss important details.

So yes, I think it has helped a lot with my studies. I wouldn't recommend it to everyone though. A lot of people might get couch-lock or skip class. You have to have some self-motivation along with the cannabis.