Great Websites for Kids - Association for Library Services to Children - http://gws.ala.org/
Merriam-Webster Online - www.merriam-webster.com
Merriam-Webster Visual Dictionary Online - http://visual.merriam-webster.com
National Geographic - www.nationalgeographic.com
OECD (Organization for Economic Co-operation and Development)
Images
Pics4Learning - http://www.pics4learning.com/