taken putih keyword student wa research kuder higher ABSTRACT who calculation 2014 224 group than department data instrument investigating state KR design significance university choice air population test reliability thesi degree showed achievement SMP mean effect there applying taught researcher aimed result text collecting medan yusniar control multiple grade language analyzed study english art sixty discussion second ttable conducted two technique sample very formula 2103321051 analysi STAD using freedom exceeded obtain level faculty experimental used richardson randomly recount reading while tobserved out division team high