Ten non-English speaking immigrant students shared their lived experiences in their secondary school mathematics classrooms in New Zealand. Through the voices of these students some understandings of the challenges they experienced as second language learners are brought to the fore. The students’ perspectives of the language-related challenges that they faced, how they made sense of learning in an environment where the medium of instruction was dissimilar to their first language, and the impact that language-related challenges may have had on their perceptions of their ability in their new environment compared to their home country, form the basis of this paper.