Make sure your child understands what you consider appropriate for him and what areas are off limits. Set clear rules and enforce them. Look into software or services that can filter or block offensive Web sites and material. Also, many Internet service providers offer site blocking, restrictions on e-mail, and other controls for parents. Be aware, however, that many children are smart enough to find ways around these restrictions.
Nothing can replace supervision.
Make a point to participate in your child's on-line time. Put the computer in the living room or family room. Stay involved and monitor what your child is doing. Find out what the Internet use policies are at your child's school or at your local library. Anyone can put information on the Internet and not all of it is reliable.