Swim Lessons Semi-Private lessons are geared towards swimmers who would like additional training on skills they have already acquired. Semi-Private lessons will have no more than three (3) students per class. This allows the lifeguard more time to spend with each participant. When registering, please let staff know what level your child is at. For children age 5-17 yrs. Please note that students will be broken into groups of (3) based on swimming ability/level, and not by age.