- Close to 80 percent of the disadvantaged immigrant students in the four big cities are in schools with more than a majority of students like themselves and that the percentage increased, but only slightly, over the nine-year period.
- The isolation index indicates that the typical disadvantaged immigrant student living in one of the big four cities was in a school with 70 percent or more disadvantaged immigrant students throughout the period
- The dissimilarity index indicates, for example, that more than 60 percent of the pupils would have to be moved to other schools in order to achieve balance, and the segregation index indicates that the gap between the exposure rate of the typical native Dutch student to disadvantaged immigrant pupils and the maximum possible average exposure rate in each city is 45 percent of the maximum exposure rate.
- Segregation is lowest in Amsterdam but has been rising somewhat over time, that segregation in the Hague is the highest of the four cities in every year and has been rising, and that segregation in Utrecht has also been also been rising
- Only in Rotterdam has segregation been consistently falling. The downward trend in Rotterdam coincides with a downward trend in residential segregation in that city.
- With the exception of The Hague, the trends in school segregation mimic the trends in residential segregation.