General knowledge:
http://www.economicshelp.org/blog/949/economics/should-university-education-be-free/
http://www.whichcountry.co/education-in-different-countries/
http://www.imf.org/external/pubs/ft/issues/issues33/
http://web.mit.edu/12.000/www/m2015/2015/ledc_medc_edcomparison.html
http://www.cgdev.org/files/2844_file_EDUCATON1.pdf+
For the countries:
http://www.accessgambia.com/information/education.html
http://www.hopeforhaiti.com/Education.html
http://www.undp.org/content/undp/en/home/mdgoverview.html
Photos:
https://www.google.com.pe/search?hl=es&site=imghp&tbm=isch&source=hp&biw=1600&bih=799&q=no+access+to+education&oq=no+access+to+education&gs_l=img.3...1073.6858.0.7370.28.16.0.11.11.0.470.2825.9j1j2j0j4.16.0....0...1ac.1.43.img..18.10.1007.pqk6AUdBYiM#facrc=_&imgdii=_&imgrc=_NjRFFA-1war9M%253A%3B0a1rO
http://www.economicshelp.org/blog/949/economics/should-university-education-be-free/
http://www.whichcountry.co/education-in-different-countries/
http://www.imf.org/external/pubs/ft/issues/issues33/
http://web.mit.edu/12.000/www/m2015/2015/ledc_medc_edcomparison.html
http://www.cgdev.org/files/2844_file_EDUCATON1.pdf+
For the countries:
http://www.accessgambia.com/information/education.html
http://www.hopeforhaiti.com/Education.html
http://www.undp.org/content/undp/en/home/mdgoverview.html
Photos:
https://www.google.com.pe/search?hl=es&site=imghp&tbm=isch&source=hp&biw=1600&bih=799&q=no+access+to+education&oq=no+access+to+education&gs_l=img.3...1073.6858.0.7370.28.16.0.11.11.0.470.2825.9j1j2j0j4.16.0....0...1ac.1.43.img..18.10.1007.pqk6AUdBYiM#facrc=_&imgdii=_&imgrc=_NjRFFA-1war9M%253A%3B0a1rO