The school, the street, your neighbours, or maid should not play the largest role in raising your children. Rather you are specifically responsible for his task. The Prophet (saw) said:
“A woman is a guardian of her husband’s house and children and is responsible for them.” [Bukhaaree]
Perhaps while you are cultivating your children, instilling within them guidance and moral standards, another person may come along and destroy that which you have worked hard to build. So do not allow others to raise and watch over your children; they may see from others that which disrupts the moral values that you have instilled.
Along with this, your home has certain standards and techniques in child rearing, which may differ from the techniques of you relatives. So observe your children an hour after mixing with their cousins. Do not neglect the importance of correcting misunderstandings, which they may have picked up while with other children; and encourage them to embrace the proper outlook.
[Taken from "20 Pieces Of Advice To My Sister Before Her Marriage", pp.56-57]