Sugar Learning Platform - document viewer activity

 Sugar Learning Platform promotes collaborative learning
 through Sugar Activities that encourage critical thinking,
 the heart of a quality education.
 Designed from the ground up especially for children,
 Sugar offers an alternative to traditional "office-desktop" software.
 .
 Learner applications in Sugar are called Activities.
 They are software packages that automatically save your work -
 producing specific instances of the Activity
 that can be resumed at a later time.
 Many Activities support learner collaboration,
 where multiple learners may be invited
 to join a collective Activity session.
 .
 The Read activity provides a document viewer
 that can display PDF, epub, djvu, and plain txt.