I personally worked for this school in 2014, and they changed the terms of my contract after I had already completed three months of my first one. Luckily they were too disorganized to notice that I never actually signed the second contract, so I had the option of leaving without consequence.
The consequences of breaking the contract amount to paying the administration more money than what you have earned from them. This happened to one teacher from Canada when she decided to leave mid contract due to frustration with the mismanagement of this working environment.
The management style of this Institute is based in negative feedback. They tell you when you are doing something wrong, and make you feel like you are a bad teacher and person, but do not give you any thanks or encouragement when you perform well.
The owner of this Business is named Sean Miranda, and he is a businessman in Canada who is also owner of a security camera company. He uses scare tactics and threats as management tecniques.
After the school year of 2014, all of the teachers quit because of the poor management and work environment, including the head teacher after having taught with Native Tongue since its outset.
The director of the Ibague campus has poor English, and is not always comprehensible, yet she is in charge of providing information about pay, feedback, human resources etc. Look at the website, she wrote the text for it, to get an idea of her English.
I overheard a meeting between Sean Miranda, who is the owner of the school, with the director of the school, and the head teacher, in an offical meeting about teacher performance and pay, and the three were discussing the racial appearance and how they pay the teachers on different scales based on their "Native" seeming appearance, meaning how white the teacher looks and sounds.
Moreover, Sean was doing all the talking while the director and head teacher laughed uncomfortably and contributed to the topic, but they did not speak up to mention how racist and illegal what he was saying was. I am speaking up now.
They are currently in a law suit with a teacher from that year about discrimination.
I do not recommend working for this school. Work for Oxford English Institute instead, or find an English teaching gig online, or just volunteer helping kids in need to learn English while you travel and learn Spanish.
Have fun on your English teaching journeys. The one solace in all of this, of course, are the students whose lives you change by teaching, and they shine through all the terrible administrations out there.