punish the bad kids or the good kids?

so, one of the [many] problems i've faced in the classroom would be discipline, especially with my 3rd grade boys. they're really rowdy and full of energy, which i guess is understandable at their age and the whole "boys will be boys..." saying, so i'm trying to be understanding. but, here comes the dilemma. if i try to discipline the ones that are misbehaving, the rest of the class is indirectly suffering since i'm wasting my time and energy trying to get the other students to settle down. at the same time, if i don't say anything to the boys, they'll just continue to misbehave and be really hard to handle, even more so than they are right now. so, if i focus my attention on the bad kids, the good kids are getting punished (in a sense) because it takes time away from them learning english, but if i only focus on the good kids and ignore the bad kids, they'll continue to just act out more frequently. one time, at the beginning of class i wasted 10 minutes trying to discipline a couple of boys, and the other students in the class were yelling at their classmates to listen to me so we could move on, but it was unsuccessful. so, if i punish the bad kids, i'm punishing the good kids at the same time, which is totally unfair to them. i've tried to kick out some of the boys, but they refused to go home (insert wth?! smiley face here), and my dad brought up the possibility that there might be stuff going on at home, so then i started feeling guilty. my heart is too weak to ever really get SUPER mad at them. the most i do is just yell and tell them to sit down and be quiet. ultimately, i just wish all my students would act like little angels with little halos above their heads...