Marijuana interferes with forming new memories, it's a pretty well known effect. Just try having a conversation with someone stoned, you're lucky if they can r

Marijuana interferes with forming new memories, it's a pretty well known effect. Just try having a conversation with someone stoned, you're lucky if they can remember what the subject is one sentence later. Obviously this effect isn't going to complement one's academic life, especially in the early stages where it's mostly rote memorization and testing.