The purpose of this study is the challenges that the teaching of SO subjects faces in the multicultural classroom. These challenges pose a problem in the process of developing students with a foreign background. The aim of this study is to highlight the challenges and opportunities that the teacher faces with students in the multicultural classroom as well as the solutions and strategies that the teacher uses to develop multicultural students. Therefore, empirical material from in-depth interviews was used about how teachers work and challenges and strategies related to this teaching area. I found few studies that address challenges and difficulties for those who have to learn socially relevant subjects in Sweden. The method that has been used is to interview four teachers in two schools. The result of this study shows that teachers use different ways to support the students in their learning of the SO subjects, for example, by using lists of important terms and words, or by using a teacher assistant in the mother tongue. By the teacher supporting the students in the right way, the students can apply new knowledge. Keywords: multicultural classroom, mother tongue and teacher assistant.