extended essay

基本解釋

The three core requirements are: (1) the student needs to write up an extended essay to investigate a topic of interest;
三個核心要求是：（1）學生必須撰寫一篇長文章，探討感興趣的主題；
blog.sina.com.cn
With regards to DP core requirements, a DP Course Candidate may register for more than one extended essay in the same session.
至於DP核心需求，DP課程候選人可以注冊多個擴展的文章在同一個會話。
This essay tries to express the extended meanings of negative prefixes, such as "negative, opposite, and reverse" etc.
從英語派生法的搆詞手法上來解釋英語“否定、反對、逆轉”等前綴及它們的一些延伸意義的用法。

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