The American Association of School Librarians (AASL) has selected http://www.21stcenturyskills.org/ as one of the Top 25 Websites for Teaching & Learning, specifically in the category of Curriculum Sharing.
The Sites listed by the AASL are all free and are designed to encourage "exploration and discovery". Each topic covered also provides the Standards for the 21st-Century Learner they address. Topics includes: Organizing and Managing, Content Collaboration, Curriculum Sharing, Media Sharing, Virtual Environments, Social Networking and Communication.
