May 1
http://www.eslholidaylessons.com/05/labor_day.html (listening)
http://www.myenglishpages.com/site_php_files/reading-international-workers-day.php (reading)
http://www.myenglishpages.com/site_php_files/vocabulary-exercise-international-workers-day.php (vocabulary quiz)
http://www.myenglishpages.com/site_php_files/vocabulary-lesson-international-workers-day.php (vocabulary)
http://www.theguardian.com/world/video/2013/may/01/may-day-celebrations-world-video (videos)