Listen, at school, just don't bring the bud inside. You can't smoke in school and if you are dealing in school I hope you get caught.
Keep the shit in your car if you really have to skip a class to smoke or if you want to smoke before/after school. True they will run the dogs by your car, which is why you have old Mc D's french fries or a burger or some shit that will throw the dog off, simply put the bud under a bunch of french fries, or in a cut out bun of a hamburger and simply show them the food and say the dog must have smelled this. If they continue to smell the car without the food, they won't find anything because the bud is in the food.
My friend had a pound in her locker, wrapped and jellied 10 layers, the dog smelled it out in seconds. Don't try to fool the dog with that bullshit, just keep it safe and don't show your shit off at school.
-Drop a 4 with 20.