With your degree and the ability you have of speaking the language is enough. Remember, you will be trained for the position. Trust me, I did it for 3 years and I became a teacher. If you need any additional info, please let me know:
ovbabies@aol.com
I don't think that the institution in Santiago has a page but for your info, there is one in la vega and another one in the capital.
look it up as Centro Cultural Dominico Americano.