This document discusses potential educational uses of cellphones and mobile devices in K-12 classrooms. It notes that students want to use their own laptops, cellphones, and mobile devices for schoolwork. Some potential classroom uses discussed include: letting students call experts or tutors; taking photos and videos on field trips; using email, texting, and apps for communication and collaboration; accessing the web and digital content; and using phone tools like calendars, clocks, notes, and GPS. The document advocates designing schools that incorporate more digital technologies, mobile devices, and online learning opportunities to engage today's students.