I would recommend you to take your son to a bilingual school. Try:
St. George School.
Carol Morgan
St. Michaels.
New Horizons.
If you are more interested in that he learns more spanish than english, try Lux Mundi, Babeque or Loyola. Anyway, FORGET ABOUT PUBLIC SHOOLS. By the way, none of this schools are cheap at all , specially the bilinguals, but if education is expensive, imagine what ignorance costs.
This a previous post from me on this subject.
First of all, before moving here, I think you should come here again and visit all the possible options (The North Coast, Santiago, Santo domingo, etc) . Find the one which you think should be better for you and your family.
However , If you want your offspring go to a collegue in the USA, I think you should live in Santo Domingo, as it has better schools. However, please note I really don`t know about the quality of the education in Santiago (Where HB, recommended the Instituto Da Vinci and the Colegio Juan XXIII of the PUCMM); nor Sosua (Where Ken recommended the International school ).
In Santo Domingo, I recommend you the following Schools:
Lux Mundi. I graduated from this school and it`s pretty good. However, it might not be the best option for you, as it focus more on Spanish than English (Although they have several levels of English, depending on the Student`s knowledge). They have a great educational level.
www.luxmundi.edunexo.com.do
New Horizons. It is a bilingual school. To me, this school has the greatest level in Math, and has the most advanced technology (They offer Cisco and Microsoft certifications to their students). Also recommended by Timex and Hillbilly.
Carol Morgan School. It`s more based on English. Accredited with Southern Association of Colleges and Schools. Has a great campus.
www.cms.edu.do
St. George School. Another totally billingual school. Recognized by the International Baccalaureate Organization. I`m a former student of this school, and I can tell you that it`s pretty demanding as they have for example, Science in English and in Spanish, etc. Also, as a member of the IBO, all high school students leave at 4:00pm .
Other schools that I think have an adequated educational level are: Babeque, St. Michaels School, The American School of Santo Domingo, etc.
Also check this thread.
http://www.dr1.com/forums/showthread.php?t=28789
Hope this helps.