Nearly every student carries a mobile device, making it a natural choice for content delivery and even field work and data capture: mobiles and their networks are virtually everywhere.
Language learners can install applications on their mobiles that let them look up words, practice hearing and speaking, and practice writing.
Detailed reference materials are available for medicine and astronomy; graphing calculator applications turn mobiles into sophisticated mathematical tools; hundreds of flash card applications are available for an array of subjects; and Google Earth now can be installed on mobile devices.