As a parent one of the best things you can teach your children is the skill of public speaking. It will boost their confidence and provide them with leadership skills in the future. It will also boost their career prospects as communication skills will increase in demand (due to the changing nature of the economy) but are not taught in enough detail in schools.
As of yet there are no official qualifications for the teaching of public speaking. Like various other life skills you do not need to be officially qualified to teach public speaking to kids. Did you require a qualification to teach your child manners, cycling, walking or talking?
All you need is patience, common sense and a passion for providing your child with excellence.