At least a quarter of the worksheets on this site have been used with Korean students, but these are the things that actually mention them, their language or their country. If you like anything here and want more, please support TEFLtastic.
Updated 7 October 2019
Teaching Korean students English articles
Japan in the Korean EFL classroom (published in the KOTESOL magazine)
Lists of useful language for teaching Korean learners English
Photocopiable classroom activities for Korean learners of English
Social customs in Korea (language of generalisation)
Teaching Korean students blog posts