Smithsonian Institution Archives: Robert H. Goddard: American Rocket Pioneer – Offers a little biographical information, info about his relationship with the Smithsonian, and links to: proposals, patent info, grants received and more.
Space.com: Robert Goddard: American Father of Rocketry – Biographical information and info about his accomplishments.
Wikipedia: Robert H. Goddard– Biographical information starting from his childhood till his death. Also, more detailed information about his accomplishments.
YouTube: Robert Hutchings Goddard Playlist – Info about Goddard and his rockets, plus info about gyroscopes and how to make a simple one.
Check out one of the videos within the list…