Great link to EXTENDED ESSAY RESOURCES FROM THE IBO
http://xmltwo.ibo.org/publications/DP/Group0/d_0_eeyyy_gui_1012_1/html/production-app3.ibo.org/publication/258/part/3/chapter/1.html
http://xmltwo.ibo.org/publications/DP/Group0/d_0_eeyyy_gui_1012_1/html/production-app3.ibo.org/publication/258/part/3/chapter/1.html