Arbitrary order:
- Jennifer Lebedev: Jennifer is a YouTube Star and pioneer teaching English on the Internet, and now she offers Twitter as another medium of teaching English. Check her out!
Twitter: http://twitter.com/#!/englishwithjenn
YouTube Channel: http://www.youtube.com/user/JenniferESL
Blog for English Teachers: http://englishwithjennifer.wordpress.com/
- Pearson Longman: Pearson Longman is the company publishing excellent series of English dictionary, without using any Korean of course. Their twitter service is also excellent and should be great for English study.
Twitter: http://twitter.com/#!/PearsonLongman
More recommendation are on the way.... ^_^