undisciplined

noncooperative, uncooperative

balky, contrary, contumacious, defiant, disobedient, froward, incompliant, insubordinate, intractable, obstreperous, rebel, rebellious, recalcitrant, recusant, refractory, restive, ungovernable, unruly, untoward, wayward, willful (or wilful)

insurgent, mutinous

adamant, adamantine, dogged, hardheaded, headstrong, immovable, implacable, inflexible, mulish, negativistic, obdurate, obstinate, opinionated, peevish, pertinacious, pigheaded, rigid, self-willed, stubborn, unbending, uncompromising, unrelenting, unyielding

fractious, restive, uncontrollable, unmanageable, wild

perverse, resistant, wrongheaded

bad, disorderly, errant, misbehaving, mischievous, monkeying, monkeyish, naughty

dissident, nonconformist

discourteous, disrespectful, ill-bred, ill-mannered, ill-natured, impertinent, impolite, impudent, inconsiderate, insolent, ornery, rude, uncivil, uncouth, ungracious, unmannerly