Very poor salary. Nowhere near enough to make foreign teachers commit to more than 10 month contracts
High levels of unprofessionalism and, at times, shambolic management
Punctuality
No consequences or punishment for students' indiscipline. Poor effort and homework, for example, very common as a result
Many supposed Colombian English teachers have poor English levels and are not qualified to teach
Co-teacher model restricts foreign teachers' influence, and often become relegated as the reader of stories for pronunciation
Poor opportunities to grow professionally
No bonuses/increased salaries/incentives for extending contract another year.
Salaries equal across Colombia, and do not take into account substantially higher cost of living in Bogota, Cartagena and San Andres, especially.
Foreigners can get lax and unprofessional. Some don't know how to teach English, and given the job on the basis of being native speakers.
English exams a complete joke. Students often given free A2 level certificates out of sympathy, when they know next to nothing