UGC NET Paper 1 GA 2011 Dec Solved Paper

Giving them an opportunity for introspection and improving their behaviour.
Expelling the errant students would be a dead end and would only exacerbate their behaviour problem.
Isolating them (in the class) would fail to correct their conduct; while they would continue to disturb the class and impede the learning process. Exercise of authority is known to be counterproductive in any attempt at reformation.