What happens in Learn-to-Swim Level 3? In Learn-to-Swim Level 3, our instructors follow a plan to introduce new swimming and water safety skills and build on previously learned skills. Each class is loaded with fun, engaging and challenging activities that motivate children to want to perform and learn to swim. Some of the milestones in Level 3 - Stroke Development include - -Jumping into deep water from the side. -Swimming the front crawl for 15 yards. -Maintaining position by treading or floating for 30 seconds. -Swimming the elementary backstroke for 15 yards. It is common for children to participate in several sessions of Level 3 before they successfully demonstrate each skill. That is okay! It is not important how quickly they move through a level, but that they acquire each skill.