For a start, a student can begin with pinoy hunks for their Adsense campaigns. I would recommend Coco Martin as your first experiment. There are a lot of searches for the name of Coco Martin and if you can make it to the top, there will be a lot of money for you.
Coco Martin is a keyword that is not tightly competed. If there are, then they are not the big boys of Adsense. Why? Because they don't give a damn for those kinds of keywords! They are for the big fish that is why the competition for Coco Martin is not that tough.