Mango Languages is an online learning system that can help you learn languages like:
GetNetWise is a resource for families and caregivers attempting to give children safe, educational, and entertaining online experiences. Their site includes a glossary of Internet terms, a guide to online safety, directions for reporting online trouble, a directory of online safety tools, a large listing of sites for children.
The Library of Congress
The Library of Congress provides both permanent and temporary online exhibits. Among these are extensive photo archives. Several subjects (among many others) include: