In the 2017/18 school year, 10% of all schools in Sweden (485 school units) catered to 42% of all newly arrived students and students with an unknown background. While background information is not known for each of the 485 school units, the available registries show that on average 47% of students (or both of the student’s parents) are bom outside of Sweden. In other words, the threshold or tipping point of 40% ‘ethnic density’ is already surpassed for up to 10% of compulsory schools in Sweden (Skolverket (National Agency for Education), 2018(i2i, Education), 2017(88]). According to the study by Branden et al.,