http://www.esldiscussions.com/p/peace.html http://iteslj.org/questions/worldpeace.html http://www.eslholidaylessons.com/09/international_day_of_peace.pdf http://www.famouspeoplelessons.com/j/john_lennon.pdf https://www.youtube.com/watch?v=0yU0JuE1jTk