1. 薄暮

1）“达瓦正在集中注意力”——2009年访问不丹时所观察到的情景。

2）“吴恩达教授收集所有关于学生举动的信息”——Interview with Andrew Ng, May 2012.

3）“就有超过10亿美元的风投资金注入教育领域”——“Catching On at Last,” Economist, June 29, 2013, http://www.economist.com/news/briefing/21580136-new-technology-poised-disrupt-americas-schools-and-then-worlds-catching-last.

4）“在线学习市场的价值超过千亿美元”——e-Learning Centre, “2012-17 Market Predictions from GSV Advisors”, http://www.e-learning-centre.co.uk/resources/market_reports_/2012_17_market_predictions_from_gsv_advisors.

5）“对教育的整体开支高达1.3万亿美元”——Talk by Jace kohlmeier, Mixpanel Office Hours, San Francisco, Video uploaded March 25, 2013, http://www.youtube.com/watch?v=Nvoc6atMpAw#t=30.

6）“学校有着‘机器的外观’”——Quoted in Joshua Davis, “How a Radical New Teaching Method Could Unleash a Generation of Geniuses,” Wired, October 15, 2013, http://www.wired.com/business/2013/10/free-thinkers/all/.

7）“走进今天的教室，他们会感到相当的熟悉”——这项观察是由Walter Isaacson 在Microsoft CEO Summit: Innovation in Education， Part 1上提出的。Posted on YouTube, August 31, 2012, http://www.youtube.com/watch?v=vAQj9g8Igck.

8）“书本将很快过时”——原访谈刊于New York Dramatic Mirror, July 9, 1913, 后被其他报刊转载。Cited in Paul Saettler, The Evolution of American Educational Technology（Charlotte, NC: Information Age Publishing, 2004）,p. 98.

9）“吴恩达教授单独一门课程的学生人数，如果凭借传统的教学手段，则需要他终其一生才能达成”——Max Chafkin, “Udacity’s Sebastian Thrun, Godfather of Free Online Education, Changes Course,”Fast Company, December 2013/January 2014, http://www.fastcompany.com/3021473/udacity-sebastian-thrun-uphill-climb.