An excellent listening and reading comprehension activity. Finding the differences between the text and Martin Luther King’s speech, spelling exercises etc.  http://michel.barbot.pagesperso-orange.fr/hotpot/mlk/dream1.htm

Considered to be the best speech of the 20th century, “I have a dream” – video http://www.blackhistorymonth.org.uk/#/i-have-a-dream-martin-luthe/4567647625

Listening, reading comprehension and vocabulary materials – Martin Luther King http://www.eslholidaylessons.com/01/martin_luther_king_day.html

Various resources at different levels : http://www.esolcourses.com/topics/martin-luther-king.html