In the TopDutch region we have a choice between both state-funded and private international schools at elementary and secondary school level. English is the main language of instruction in all of the international schools in the TopDutch region, however of course there is a lot of support to help children that do not yet speak much English and Dutch is always taught as a second language.
There are three choices in the Northern Netherlands:
GSV International Department (Groningen) follows the  British Curriculum for Primary Schools, combined with the International Primary Curriculum. Within the wider school is also a bi-lingual department, which is aimed at Dutch pupils who want to be educated partially in English.
Eerde International Boarding School (Ommen) is a day and boarding private school that educates from ages 4-19. They follow Cambridge Primary and Middle Years Curriculum, the International Primary and Middle Years Curriculum, iGCSEs and the International Baccalaureate Diploma program.
International School Groningen (Haren, Groningen) is a state-funded English-taught secondary school. They follow the International Baccalaureate Middle Years and Diploma program.