A Little of history
http://www.enchantedlearning.com/olympics/
http://www.london2012.com/games/
http://www2.lhric.org/pocantico/olympics/1.htm
http://en.wikipedia.org/wiki/olympic_Games
Sports, mascots and symbols
http://news.bbc.co.uk/sport2/hi/olympics_2004/photo_galleries/3068021.stm
http://www.technologystudent.com/despro2/olymp2.htm
http://www.olympic.org/en/content/Sports/
http://inventorspot.com/articles/the_top_10_coolest_olympic_mascots_16307
http://news.bbc.co.uk/sports
http://en.wikipedia.org/wiki/olympic_symbols
Sports vocabulary
http://www.saberingles.com.ar/lists/olympics.htm
http://www.learnenglish.de/vocabulary/sport.htm
http://esl.about.com/library/vocabulary/blwordgroups_sports.htm