This manual is designed to help teachers gain comfort and confidence with the constantly emerging technologies that are entering the classroom. Teachers may not be able to control what technologies are put before them, but they can control how, and if, they are used. This book offers practical solutions for turning the computer into a valuable teaching tool both inside and outside the classroom. It shows how teachers can use a single computer to help ease their administrative burdens, enliven classroom presentations, spark discussions, and foster cooperative learning and critical thinking. The fourth edition of the book includes a new chapter on the Internet, in addition to its how-to guidance for computer use in the classroom, new product highlights, and description of using CD-ROM, videodisc, multimedia, and other technologies in the classroom. Appendices include step-by-step instructions for getting started with some basic software tools and classroom applications as well as general information: creating a spreadsheet gradebook; using ClarisWorks Mail Merge and Slide Show; video output devices; connecting a Mac or PC to a television; list of education and technology organizations; list of education and technology publications; list of 59 education-centered listserv discussion groups; glossary of Internet terms; and a 27-item reading list. (SWC)