The "trouble" group is the result of splitting them out. You don't end up with a whole room of problematic kids and a couple of misidentified gifted kids when t

The "trouble" group is the result of splitting them out. You don't end up with a whole room of problematic kids and a couple of misidentified gifted kids when they are mixed. It depends on the specific kind of "trouble". If you have students who don't get the material, and need extra assistance, that's one thing. At least they don't "disrupt the learning environment" (as they say the edu-speak that teachers and administrators use). On the other hand, if they are bored, really don't want to be there, blurt out things at random, make animal sounds to amuse themselves, etc., this affects other students and the whole mood of the classroom. (To say nothing of threats, hostile behavior, actual violence, etc.) Such students need to be physically removed in order to enable the others to learn undisrupted.