Swim Lessons. LEVEL V/VI - PROFICIENCY AND ADVANCE SKILLS - is a combined class designed to further coordinate and refine strokes learned in previous levels. Students will begin to swim with ease, power and efficiency over greater distances. Increase endurance and strength in front crawl, back, breast and butterfly strokes combined with introduction to flip turns and competitive starts. Completion of Level V/VI leads to the Swim Team Prep class. PREREQUISITES: Participants must be ages 5 to 15 in addition to satisfactory completion of Level IV or demonstrate necessary skills: front crawl and back stroke for 50 yards each, breast and butterfly strokes for 25 yards each. Class may be repeated as necessary. NO CLASS 7/3.