This document provides instructions on how to produce the /s/ sound in English. It explains that the tip of the tongue should be lightly placed behind the upper teeth without touching. Air is pushed out while squeezing between the tongue and top of the mouth, creating friction. The vocal cords should not vibrate. It then lists words containing the /s/ sound in initial, medial, and final positions for drilling pronunciation. Phrase, sentence, and paragraph drills are also included, along with minimal word pairs distinguishing the /s/ sound.