Level 4 This class should improve participants' proficiency in performing the swimming strokes that were introduced in Level 3. Participants perform these strokes with increased proficiency and can swim them for greater distances. In addition, participants learn the arm actions that accompany the scissors kick and breaststroke kick to begin performing the sidestroke and breaststroke at rudimentary proficiency levels. Participants also learn the back crawl and butterfly at rudimentary proficiency levels, in addition to the basics of performing a simple open turn at a wall. Prerequisite: Successful completion of Level 3.