The role of teenager is never constant. it changes time by times. In the past, no one really respects an adolescent. They just take them for granted. But now, since the start of 21st century, all things change in a significant way, people especially teenagers get more chances to prove themselves. They begin to do extra work which even though a bit low-paid still contribute partly or wholy to the economies of these countries. Not only in this aspect, they have more impact on another field also, some teenagers are so intelligent that they could set up a company on their own and manage all the things. Some teenagers got many certificates at a young age and this is really affecting the world