Waterworks Aquatics Pasadena @ Gerrish can group two swimmers of similar age and ability with a professional swimming instructor for semi-private swimming lessons. At a lower cost swim lesson option, swimmers benefit from the personal attention they receive. They are also encouraged to learn visually from each other. Semi-private swim lessons are perfect for friends and families that prefer their children to build on their swimming skills together. Waterworks will also pair your child with another equally-matched swimmer.