Pay these perfectionists no heed kiai & LaRubia03 - once a teacher, ALWAYS a teacher!!!
You should ask yourself what you need to live on first because pay for teaching in the DR can be quite poor compared to your home country. Where do you want to live, what qualifications do you already have, what subjects do you want/need/are you capable of teaching? What age groups (any student is "Young Children" to my ancient years!).
Check the search function at the head of this page & use the advanced search function using the keywords "Teaching", "Teaching English", "International School of Sosua" (if you are considering the NORTH Coast). If you want Santiago or Santo Domingo areas, others will chirp in with their locally known schools I am sure!
Unless you are a 'One in a Thousand' qualified teacher though, do not expect much - you could be lucky but more likely you will be disappointed!! ~ Grahame.