Preschool 4: Preschoolers will gain some independence in deep water. They will practice jumping into deeper water (including getting out by themselves), sideways entries, and opening their eyes underwater, and work on their ability to tread water. These swimmers in training will work on completing up to 7 m of front and back glides as well as 5 m of front crawl in lifejackets. Preschool 5: Preschoolers will work towards achieving important swimming milestones. They will work on being able to support themselves treading in deep water for 10 seconds and complete 5 m swims with front crawl and back crawl. Wearing a lifejacket, they will practice forward roll entries into deep water, learn to whip kick in a vertical position, and be introduced to interval training.