I answered a question about writing a linguistics-related IB Extended Essay a while back, and I have a few more thoughts to add.
First I’d like to point out this post by Leland Paul Kusmer, current linguist/former IB student (and also friend of the blog), where he talks about his experience trying to write an Extended Essay in music and linguistics:
As a former IB kid and a high school protolinguist myself, I thought I should share my story about trying to do a linguistics-focused EE. (Spoiler alert: It didn’t end well.)
[…] In retrospect, I really should have done either some aspect of mathematical linguistics or worked with my English teacher (who, as mentioned, had a BA in linguistics) to come up with something; instead, I went for the crazier option and tried to write a linguistics EE in Music. […]
Here’s the problem with this: My EE did not wind up qualifying as a Music Extended Essay! This is the downside of being an extremely self-motivated high schooler: I went ahead and wrote almost my entire EE without once talking it through with my advisor (the music teacher).
(Read the rest)
There are also a few follow-up comments, on IB language courses and on writing a linguistics EE in English language/literature. I’ve had several people message me since then asking if they should do a linguistics EE, and I still think that if it’s the topic you’re most excited about and you have a teacher who’s willing to advise you, it can be a good experience, but make sure you check and re-check the requirements for your subject area carefully and either a) fulfill them or b) make your peace with not fulfilling them, rather than be caught unawares.