The document discusses how teachers can use internet activities to energize ESL/EFL classrooms. It outlines four categories of internet-based activities: (1) activities that involve searching for information, (2) publishing information on web pages or blogs, (3) conversational activities through email or chats, and (4) activities that allow students to reply or talk. The document provides examples for each category and recommendations for teachers to ensure activities maintain student interest and provide learning opportunities, such as checking students' work before publication to reduce anxiety over mistakes.