【A．Finally，ithastakenagiantleapforward．B．Allofthefactorspushingonlineeducationtowardthemainstreamofhighereducationarenowcrashingtogether．C．Overthepastfewyears，hehasbeenteachinghimselfprogramming．D】
A．Finally，ithastakenagiantleapforward．
B．Allofthefactorspushingonlineeducationtowardthemainstreamofhighereducationarenowcrashingtogether．
C．Overthepastfewyears，hehasbeenteachinghimselfprogramming．
D．Inotherwords，Coursera'sapproachisalongwayfromasimpleonlinevideolecture．
E．Yetthemostexcitingpromiseoftheircompanyandthelikeistheroletheymightplayinimprovingeducationforthepooraroundtheworld．
F．Ng'scourseinmachinelearningattracted104，000enrolleesaroundtheworld．A School That Can Educate Us All
Christos Porios，16，lives in a small Greek city．"My mother's a teacher and my father's a mechanic，"he explains，adding that neither is knowledgeable about computers-especially compared with him．（67）___
Porios was taking a free class in machine learning offered by Andrew Ng，a professor at Stanford University，over an online platform Ng developed with his colleagues．Drawing on what he learned，Porios was able to participate in the International Space Apps Challenge，a virtual hackathon （编程马拉松） using data from NASA and other government agencies．
If one teenager in one small city can become a genius hacker through an online course，does it mean the world has changed？We have been hearing about the potential of online education for decades．
（68）___ A number of online education platforms have appeared，featuring professors from top universities offering free courses．
（69）___ Ng was amazed．"It would take me 250years to teach this many people at Stanford，"he says．And so，just one month into the course，Ng and his Stanford colleague，Daphne Koller，decided to leave their faculty posts （教职） and dive into online teaching full-time．In April，they launched their company，Coursera，with a $16million round of venture funding．So far，it has managed to team up with 35colleges in nine countries．
To Ng and Koller，Coursera's mission is simple and yet grand．That is to