This directory is the fourth in an annual series of Internet guides for educators, librarians, and school administrators, and provides tips on access to, as well as addresses for, online resources that support and enrich the K-12 curriculum and supplement the school library core collection. Sites that help educators develop professionally are also covered. This edition includes 400 completely new entries with more Web sites than ever before. A new chapter on applied sciences is also added. The book features more listings for multicultural resources and increased coverage on life after high school--colleges, careers, school-to-work, and vocational education. All sites are free, current, and updated regularly, and the book includes everything users need to take advantage of them--clear directions for access, the path name, and other instructions needed for login and navigation. Free updates of addresses are available to users through the Libraries Unlimited Web site. Resources are grouped topically, with chapters on art, music, and drama; foreign languages; language arts; math and computer science; science; applied sciences--health, home economics, and physical education and sports; social studies and geography; reference; and school library applications. Alphabetical and subject indexes of sites are provided. (SWC)