Educational challenges of immigrant children in South African schools include among others, poor English proficiency. This challenge poses a challenge of negative self-efficacy to teachers. I became aware of the immigrants’ challenges from the teachers’ complaints. The teachers complained about the immigrant learners’ poor English proficiency and behaviour. I also became aware that the immigrant learners isolated themselves from the local learners. They also did not participate actively during oral classroom activities. I sought to investigate the immigrant learners’ language challenges and how these challenges influence their behaviour in the learning environment. The question that arose is: How does the language challenge of immigrant children in the Foundation Phase classes of South African schools influence their behaviour in the learning environment? The study consists of six chapters. The literature reviewed provided psychological and sociological theories that explain the relationship between language and behaviour. Programmes that were designed by various education systems were looked at in order to ascertain how the language challenges and behaviour of immigrant school children have unfolded and dealt with in different countries. The qualitative research method was used. This was a case study of three schools situated in Tshwane North district. Sampling was purposive and data was collected by means of observations, focus group interviews, individual interviews and artefacts. Ethical considerations were also presented. The findings from the data indicate that immigrant learners experience a great deal of frustration, sadness, anxiety and stress relating to coping with prejudice and discrimination because of their poor English. Teachers were also distressed by their inability to assist these learners. A programme that integrates language teaching with social skills is suggested. The aim is to foster a positive learning environment by incorporating psychosocial content in language teaching. A positive learning environment promotes positive behaviour. / Psychology of Education / D. Ed. (Psychology of Education)