Semi-Private Swim Lessons Enjoy personalized instruction with a friend, sibling, or family member of a similar skill level. Semi-private lessons provide focused instruction while allowing two-three swimmers to learn together. Both swimmers must register before lessons can be scheduled. Annual registration required (January 1 - December 31). Includes 4 lessons that are 30 minutes long. Swimmers that are not FULLY potty trained must wear a swim diaper. Semi-private lessons require that the registering family have confirmation from a second participant(s) before registering for a semi-private lesson. The second participant MUST register before the semi-private lesson can be scheduled.