Must pass level 3 before taking this class. Level 4 develops confidence in the skills learned and improves other aquatic skills: Head first entries from the side in compact and stride positions; swim under water; feet first surface dive; survival swimming; front crawl and backstroke; open turns; tread water using 2 different kicks; front and back crawl; elementary backstroke breaststroke; sidestroke and butterfly; flutter and dolphin kicks on back.