6 - When the child grows skilled at swimming under water, encourage him to jump in — after making sure the water is deep enough.
8 - Floating and swimming forward... a step the child attains after he has practiced the first steps.
7 - The "picture frame" game, in which the child puts his face in the middle of the frame (his arms) and walks in shallow water no higher than his chest...
In any case, do not put off teaching your child to swim beyond the ninth year, lest he feel his companions' superiority over him... and his own ignorance and dullness beside them... Spare him the "feeling of inferiority" by encouraging him to learn swimming as soon as he shows the desire for it.
It will be noticed that a child of this age has little endurance or patience for keeping up one and the same movement for more than a minute; so try to drive away his boredom and his fatigue by passing
quickly from one movement to another... And choose words that ring in a child's ear: "Now you are a duck!! And you must dive under the water!" — which means that the child must hold his nose shut with one hand, so the water does not get in...
Train your child to swim in this way, while the two of you play and frolic in the water, and you will be amazed at the speed with which he learns, and at the eagerness he shows to go with you to the sea!