There are 4 that are either English or bilingual.
The International school in La Mulata.
The Learning Center, up Camino Llibre.
Another school, just behind the Palms, near trade Winds.
Doctor Bob has a school adjacent to his veterenarian clinic.
I don't know prices nor do I have contact info, but this could get you started out.
I understand that the International school would be the most expensive, of the group.