If you are interested in becoming certified to teach english, there are two highly recommended and internationally recognized certification programs: CELTA and TrinityCert TESOL.
This teaching qualification is intended for participants with little or no previous teaching experience. The course can be taken full-time ( 4 to 5 weeks) or part-time over a few months. There are over 286 centers in 54 countries.
Visit the CELTA website for more information: http://www.cambridgeesol.org/exams/teaching-awards/celta.html
Go to "contact your chosen center directly" for more detailed information on programs around the world
This certificate is through Trinity College London, and is also intended for those with little or no previous teaching experience.
Visit the website for more information: http://www.trinitycollege.co.uk/site/?id=201