Coaches and instructors work with kids until they can swim individually. No, I am not trying to scare you as most swimming instructors and understood classes are completely analyzed by governing bodies and have reassessment and lifeguard abilities, both intermediate and advanced that ensure the safety of your kids. The biggest thing that will make excellent swimming is interaction, interaction is the turnkey to make your kid a fantastic swimmer, and interaction will allow your kid to listen to directions properly. It would be wise to get an instructor that has an excellent history with dealing with kids, though I will not be taking away from instructors that have a broad experience with grownups, I am sure that they are exceptional trainers, however I know that some moms and dads would choose somebody with experience mentor children.
For those considering swimming lessons for kids - the
https://kidswim.org/