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Chapter 1 Introduction

This chapter begins with an introduction to the research background, focusing on the necessity  of  further  study  on  multimodal  discourse  analysis  of  English  language MOOC  from  the  perspective  of  logico-semantic  relations.  Then,  it  outlines  the purpose of the present study in relation to the benefits of the research of the relations between  visual  texts  and  teacher’s  talk  to  classroom  teaching  and  multimodal discourse  analysis.  On  the  basis  of  the  research  purpose,  the  author  proposes  the research  questions  concerning  how  visual  texts  in  College  English  Reading  MOOC are  deployed  to  elaborate,  extend  and  enhance  the  teacher’s  talk.  Then,  the significance of the study is described, followed by the layout of the thesis in the end. 

1.1 Research Background 
Since  Massachusetts  Institute  of  Technology  (MIT)  launched  the  Open  Courseware Movement  and  provided  more  than  2000  courses  on  the  Internet  for  free  in  2001, many  world  top  universities  including  Harvard  University,  Yale  University  and Stanford  University  have  joined  the  Movement  gradually  (Wang  &  Dou  2014).  This laid  a  foundation  of  the  emergence  of  Massive  Open  Online  Courses  (MOOC). Furthermore,  Salman  Khan  established  “Khan  Academy”  in  2007,  which  was  a non-profit  organization  providing  videos  of  different  subjects  online  (Yuan  &  Ma 2004).  After  the  establishment  of  this  organization,  more  and  more  people  showed their increasing interests in it. Therefore, this organization accelerated the emergence of  MOOC  (Wang  &  Dou  2014).  The  following  year  witnessed  the  emergence  of  the term “MOOC” put forward by Dave Cormier and Bryan Alexander. After that, a large amount of MOOC platforms have been gradually established including the Cousrera, Udacity,  edx  and  so  on  and  have  attracted  millions  of  students.  Meanwhile,  the MOOC  plays  increasingly  important  role  in  the field  of  Education  all  over  the world (Wang  & Dou 2014). Therefore, it has drawn increasing attention among  researchers both at home and aboard (Kop 2011; Stephen 2013; Wang 2013; Han 2013; Fan 2012; Liu &Chen 2013; Wang 2013; Pan 2013; Zhi 2015; Yang &Wei & Zhang 2015; Luo 2016; Liu & Zhai & Ma 2016). 
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1.2 Purpose of the Study 
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