„Comprehensive and consistent L2 [Anm.: Zweitsprache] support interventions are the very aspects of schooling that distinguished those countries with the smallest gaps in performance between native and immigrant students on the PISA assessment.“
Esther Yoona Cho, „Migrants, language and education: An international perspective“. In: OECD (Hrsg.), „Languages in a Global World“ (2012), S. 341