1) The document describes an experiment where a high school English teacher had her students role-play Shakespeare's Hamlet in real time using Twitter accounts for each character.
2) Some benefits discovered were gaining insights into parts of the story happening off stage, appreciating all roles equally, and reading the text with clear purpose.
3) The teacher provides tips for setting up the role play, including creating Twitter accounts for each character, assigning understudies, scheduling time for in-class tweeting and discussion, and using tools like lists and Storify for organizing the tweets.