Green兄弟在Youtube上开创了Crash Course和SciShow。该项目获得了YouTube“原创频道”项目的资助 ... 在10分钟内向大家展示世界历史的每一个部分。 课程介绍：CrashCourse Big History系列是由速成课与Youtube网站的Big History项目合作，于2014年9月开始连载的课程。

In 48 episodes, John Green will teach you the history of the United States of America! This course is based off of the 2013 AP US History curriculum. By the end of the course, you will be able to ...