Would this eating habit be healthy?

I eat..a lot. When I'm at home, I can't go an hour without eating something so I'm full most of the time. At school by 3rd period, I already feel hungry. At home, I eat stuff like apples, cereal, sunchips, yogurt, hot cheetos, fruits, cookies[rarely], juice, etc. I drink alot of water though. How do I train myself to not get hungry so easily?