You needn't try to bribe me. Don't even waste your time thinking about it. This instructor doesn't need a Rolex watch. In fact, there's absolutely nothing you could offer that would make an effective bribe.
Food, however, is graciously accepted. Cookies will not have the slightest effect on your marks. Yet, food is universal and it's always nice to see someone smile, isn't it?
Truly,
Your teacher