Family Shield, powered by OpenDNS, is a service that can be used to filter the content accessed by anyone on your home network. Family Shield is designed to filter adult websites, proxy and anonymizer websites, and phishing websites. Step-by-step directions are provided for setting-up Family Shield on your home computer(s) and router(s).

Applications for Education
I generally prefer to emphasize education about the Internet over blocking access to the Internet, but I also understand that a lot of parents would still prefer to have a way to restrict the content their children can access from home. If you’re asked by a parent for advice on Internet filtering at home, consider referring that person to Family Shield.

Here are some related items that may be of interest to you:
Phishing Detection Education
A Thin Line – Digital Safety Education for Teens
Safe Computing Tools for Kids – Windows Based