This document discusses using mobile technologies like text messaging and Twitter for teaching and learning. It provides statistics on cell phone and text messaging use. It then gives examples of how instructors can use tools like Textmarks and PollEverywhere to send announcements, surveys, and polls to students via text without needing students' phone numbers. The document also discusses how Twitter can be used to connect students, send reminders, and promote discussion both inside and outside the classroom. It shares an example of a health instructor's Twitter use and student feedback from a pilot assignment.