Key words: Slot Substitution Drills, Audio Lingual Method, Grammar The objectives of the study are to describe the implementation of using Slot Substitution Drills in Audio Lingual Method and to find out the effect of using Slot Substitution Drills in Audio Lingual Method towards grammar ability of the first grade students of SMP Negeri 1 Randudongkal in the academic year of 2011/2012. Slot…