https://ocw.nctu.edu.tw/course.php
http://ocw.nthu.edu.tw/ocw/index.php?lang=en
http://ocw.lib.ntnu.edu.tw
https://www.tocec.org.tw/web/index.jsp
https://ocw.mit.edu/index.htm
http://ctld.video.nccu.edu.tw/
https://oyc.yale.edu/
https://tl.hku.hk/hkuonline/
https://online-learning.harvard.edu/
https://www.classcentral.com/subjects
