extended essay

基本解释

The three core requirements are: (1) the student needs to write up an extended essay to investigate a topic of interest;
三个核心要求是：（1）学生必须撰写一篇长文章，探讨感兴趣的主题；
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With regards to DP core requirements, a DP Course Candidate may register for more than one extended essay in the same session.
至于DP核心需求，DP课程候选人可以注册多个扩展的文章在同一个会话。
This essay tries to express the extended meanings of negative prefixes, such as "negative, opposite, and reverse" etc.
从英语派生法的构词手法上来解释英语“否定、反对、逆转”等前缀及它们的一些延伸意义的用法。

For the techie on your list, try In the Beginning Was the Command Line by Neal Stephenson, his extended essay on the relationship between culture and the computer.
NPR: The Least Material of Material Gifts