I'm interested in going to Mexico to take a course and stay to teach there. I'd like to be able to take that training outside of Mexico at some point to teach in Spain or the Czech Republic. Would it make a huge difference to obtain a CELTA (IH in Playa del Carmen)? How does the TESOL play into getting a position internationally, does it help? Any experiences with TESOL courses at ITI in Queretaro or ITTO in Guadalajara? ITTO advertises the course as TEFL/TESL/TESOL so I'm wary of that a bit. Thanks in advance!