4. Nanny Basic Skills
NIDS offers its Nanny Basic Skills Assessment, which can give a family peace of mind when interviewing nannies who have passed it. NIDS Team says that it was developed to "provide a credential to those nannies who did not have a degree in a child-related field or to those nannies who wanted to add a nanny-specific credential to their portfolio." It tests your knowledge of child care -- including topics like health, safety, nutrition, professionalism and child development -- and, if you pass, you get a certificate to confirm your expertise.
If you want to take it a step further, sign up for the more intensive NIDS Programe. Pass that, and you'll be considered an NIDS CERTIFIED Nanny.