I'm trying to understand why you would raise that. It seems to me you're trying to connect marijuana with better academic performance, which is ludicrous because the primary effects of marijuana are euphoria, memory loss, and apathy. If you want to destroy a student's future, probably the best drug you could give them is marijuana because it ruins their memory; they can't learn anything in school, and it causes apathy and they won't care.
Why are you trying to connect marijuana to better academic performance?