BBC: William I, William the Conqueror (c.1028 - 1087): Overview of the king who successfully invaded England and changed the course of English history.
Kids' Zone: King William I: Profile of King William I 'the Conqueror' for children.
The Normans: William I: Outline of the reign of William I (The Conqueror).
The Normans: William I: Outline of the reign of William I (The Conqueror).
William I (of England): Article from Encarta Encyclopedia provides detailed overview of William's life and reign.
William I, King of England: Simple, kid-friendly history of William I, with links to his successors. Information based on the Columbia Electronic Encyclopedia.