This booklet presents educators with practical ways to put the Internet to work in the classroom. An introduction provides resources for getting connected to and exploring the Internet. The next section on using the Web in the classroom discusses a student-created Web survey; cooperative challenge; social action; community connection; simulation; Web publishing; and multimedia. The following five sections present teacher-tested Internet-based projects for different grade levels ranging from kindergarten through grade 12. Each lesson plan (project) identifies the subject, grade level, activity type, activity level, time frame, partners, materials needed, objectives, procedure, timeline, extension activities, and helpful tip. The five lesson plans are: Project 1, "Mighty M&M Math" (students compare the proportion of M&M candies by color to percentages worldwide; project 2, "The Animal Project" (students around the world record and compare the animals seen during a given week; project 3, "Spring Fling" (students record and compare signs of spring across the United States); project 4, "Origami Outing" (students collaborate with Japanese students to learn the art of origami; and project 5, "Groundhog Watch" (students in different locations around the globe measure and compare their shadow's length). (AEF)