This document discusses potential ways that teachers can use Twitter in the classroom. It provides examples such as tweeting about assignments and due dates, coordinating project collaboration between students, taking and sharing notes, providing a news feed for current events, posting puzzles for subjects like math and science, writing reviews for literature and media, playing word games to practice vocabulary, and having students summarize lessons in 140 characters or less. The document also discusses how Twitter can be used as a data collection tool in surveys and how it archives information that may be useful for future historical research.