[yunyeng]

Yes I would think you should learn mobile development but you don't have to take off school, If you know the basic programming you should learn iOS or Android in few months after school and weekends. Consider College courses first maybe at Coursera.org they have few Android Courses, I learned Android in a month with also going to school but I knew Java. If you want to learn iOS Development, start with Objective-C I think in Itunes there are Stanford Courses about iOS Development, that should do it. If you want a career in Web / Mobile Development you should learn a lot of platforms, Because it is an incredible fast growing sector, I am sorry but it is I cannot catch it too. Before you jump off to mobile development, my advice learn the mobile website basics HTML5, javascript apps etc. Then the mobile development is another platform and you have to be really ready for it. Last of all, you don't have to break off school at any circumstances at all. Keep it going...