adjective

causing or tending to cause disruption.

disruptive pupils

troublemaking,troublesome,unruly,rowdy,disorderly,undisciplined,attention-seeking,riotous,wild,turbulent,unmanageable,uncontrollable,out of control/hand,unrestrained,obstreperous,truculent,fractious,divisive,badly behaved,misbehaving,errant,uncooperative,rebellious,disturbing,distracting,unsettling,upsetting,noisy,raucous,refractory