„Separate/preparatory classes, for all or most lessons, are provided in about 18 education systems. Their purpose is to provide intensive and targeted support to those who are new to the education system, and to prepare them to integrate into mainstream education. […] In 13 of the systems with separate/preparatory classes, students spend their whole school day in this separate provision.“
EU-Kommission (Hrsg.), „Integrating Students from Migrant Backgrounds into Schools in Europe“ (2019), S. 84