OUTLINE Dian Ariana Junaedi (AG.1) I. Introduction : (Question) General Statement : Who does not know Iphone, Samsung, Sony, Nokia even Blackberry? Those brands of smartphone is now widely chosen by many people as a sophisticated device of communication even the teenagers. So that, it is not the strange thing, if the teenagers have a smartphone. Teenegers who should closely related with books in school, instead close with a smartphone. Now, the teenagers use smartphone in their daily lives even at the classroom. The classroom where is the place that we can get knowledge, but they abuse it by using smartphones. Thesis : Using smartphone disturbs the concentration of student in learning process in school. II. Pro Idea 1 : With the addiction of smartphone, teenagers prefer to pay attention for their smartphone which is more attractive than teacher’s explanation about a boring subject. It is really disturb learning process in school. III. Pro Idea 2 : With the features o