I'm a little curious as to your nationality. I get the impression you're Indonesian, not Spanish, otherwise I can't see any reason why you'd want your kids to learn English and go to university HERE. Indonesian universities just aren't good enough to warrant that.
Also, why would you come HERE to have your kids learn English? Why not live in Europe where English is much more common than here?
I cannot speak of most of the schools in Jakarta other than what I mentioned in another thread here about Singapore School.
As to curriculum, I guess I need to ask you: Are you more interested in a traditional style of education that ignores personality, learning and skills differences between students, focuses on "core" skills in maths, language and science and neglects creativity and the development of social and emotional skills, or would you prefer a more progressive curriculum that tries to prepare students for the real world by placing much higher emphasis on developing leadership and entrepreneurial skills, EQ, creativity and other things along with the understanding of the normal subjects that are taught? What kind of curriculum do they use in Spain?
I'm sure lots of other people will comment for you, just be patient.