The internet gives us convenience, but also cause lots of distraction. As a high school student,  in one side, he need internet to help with his homework, do his project, do research related to his science club events, etc; in another side, he spent a lot of time, to watch video, play online game, or just browsing the web for fun. At one period of time, we can observe some kind of addiction to the web  happening to John, fortunately, he himself realized it, and he adopt some restriction approaches to himself, like blocking some unrelated website from his computer, making a schedule alarm, and even cutting off the internet connection at certain time. we are glad and relieved, and take this kind of self-control as an indicator he is getting matured.