1Big Data for Development:Challenges&Opportunities;. http://www.un/BigD ataforD evelopment . 2012
2Andreas Schleicher.Big Data and PISA. http://www.huffingtonpost.com/andreas-schleicher/big-data-and-pisa_b_3633558.html .
3Enhancing Teaching and Learning through Educational Data Mining and Learning Analytics. www.tech.ed.gov/wp-content/uploads/2014/03/edm-labrief.pdf . 2012