identify the purpose for writing (i.e., to entertain, to inform, and to report)

http://www.studyzone.org/testprep/ela4/h/authorpur.cfm

http://www.manatee.k12.fl.us/sites/elementary/palmasola/rcap1.htm

http://www.oswego.org/ocsd-web/match/term/matchgeneric2.asp?filename=kderitteauth

http://www.citycol.com/basic_skills/Quizzes/Purpose/reading_purpose.htm