This handbook is designed to meet the practical needs of three specific groups of K-12 educators and students: (1) those who are examining for the first time the possibilities of either their own use or their school's use of Internet services and resources; (2) those who are just beginning to use the Internet to explore different resources, and need help in becoming familiar with its many new concepts and procedures; and (3) those who are already experienced in using some Internet services and resources but who need a handy reference to specific Internet procedures, terms, and locations of special interest to K-12 educators and students. Because the Internet is a rapidly changing environment, this document includes only the most stable of network services of use to this group. Section I contains answers to questions most frequently asked by school Internet users in the following areas: the Internet in an educational setting; school support for an Internet connection; implementation and technical options; security and ethics; and educational collaboration, projects, and resources. Section II examines Internet search tools, which are organized into communication tools, tools for accessing online information, and other search tools. Section III presents a guide to K-12 Internet resources, including newsgroups, mailing lists, collaborative projects, interesting sites, and examples of educational projects using the Internet. A list of suggested readings, a glossary of terms, an index, and a quick reference sheet for Internet commands are also provided. (JLB)