The objectives of Level 4 are to develop swimmers' confidence in the strokes learned and to improve other aquatic skills such as treading, and sidestroke. In Level 4 swimmers improve their learned skills and increase their endurance by swimming familiar strokes such as front crawl, elementary backstroke for great distance. Swimmers add the arms to the scissors kick for the sidestroke. Participants also start to learn the back crawl, breaststroke and butterfly and the basics of flip turns.