how old are you? if you are under 18 i'm not sure there's anything you can say to your mom to convince her that you smoking pot is OK and she lets you continue to smoke. talk to her to her face about it, thats the best way. writing notes is easy because you can think about everything first, but its just not as effective. just talk with her like an adult, don't yell, don't say anything you're going to regret. also, the best thing to do is get/keep your grades up, keep up on any chores and maybe do more than you normally do, and just prove to her that its not a big deal as everyone thinks. also understand that it is your mom, who hears "marijuana" and instantly associates that with "drug," and "drugs are bad". your mom just cares, just be honest and rational.