Make sure lessons are conducted in a clean, well-supervised environment. The gate should be kept closed at all times. Don't forget to make sure sliding doors are closed if they open onto a pool deck. Remove pool covers completely before using the pool. Water that has collected on the top of the pool cover can be as dangerous.
Children can fall and become trapped beneath the cover.
Make sure there is proper safety equipment around the pool. Try to have a portable phone so that you can call for help if needed. Make sure young swimmers are always supervised by an adult. Remember that most backyard pools are too shallow for safe diving. Make sure they fit properly and that everyone wears them.