Learn the Step Jump
The child jumps from the pool edge while standing, into water that is about chest-deep. Upon entering the water, the entire head submerges. This exercise primarily trains the core element of water acclimation.
Preparation Exercises

Pull along the edge
In the deep pool, the child pulls themselves along the edge, alternating hands, for about ten meters. Afterward, they try to climb out of the pool on their own, with parental support if needed. The tuck jump exercise is necessary in deep water to avoid injuries. However, many children are afraid of the deep water. Pulling along the edge helps them become familiar with the deep water and makes it easier for them to later attempt the jump. If your child is afraid of the deep water, start with a regular jump before progressing to the tuck jump.

Jumping together is more fun
If your child is hesitant to jump into the water, it might help to swim with other children of the same age, such as siblings or friends. Group dynamics can encourage your child to take the leap as well. Make sure that most of the children are willing to jump, as this can reduce your child's fear.

Courage test over mat
Place a swim mat at the edge of the pool and hold it securely. The child should cross the mat in different ways. Shy children might start on all fours and become braver with repeated attempts. Ensure there are no other children or hard objects nearby. The goal is to reduce fear of the water, with the exercise being adaptable to each child's comfort level.