Children aged 12 to 18 who do not speak Dutch will be placed in an international bridge class, called the Internationale Schakelklas (ISK). The ISK offers full-time education, with the main goal of preparing students to transition into regular Dutch-speaking classes.
In Amstelveen, there are two ISK schools:
Futuris for children aged 12 to 16 years old
Nova College for children aged 16 and over.
Annebet van Mameren from New2NL made a nice video to explain the Dutch secondary school system, please see the video below.