Level 4 - Students in level 4 are now mastering the skills they have learned in the previous levels. Swimmers should know rhythmic breathing (breathing to the side) proper body positions in the water on the front and back. They will improve their freestyle and backstroke, and should be able to swim further distances while refining their breathing skills and stroke technique for freestyle and backstroke. Students will continue to work on breaststroke kick adding arms strokes, while learning the proper timing of the stroke. At this level students are introduced to the butterfly kick on their front, side and back. Upon mastering these skills students will advance to Stroke School.