Global migration has had significant impact on the traditional configuration of the classroom role set. The language teacher may be teaching a group of learners with highly mixed interests, abilities, learning histories and exposures to the target language, while the language learner may be confronted with so many different models of the target language that notions of native, first, second and foreign languages become blurred. This article deals with a specific language classroom context, where the traditional role set of the teacher and the learner, and the power relations implied in such a role set, is being challenged by the socio-cultural changes that are going on simultaneously in the community and society at large. Using the theoretical concepts of "funds of knowledge","symbolic competence" and "translanguaging", this article investigates how teachers and pupils in the complementary schools for Chinese children in Britain utilise and negotiate the discrepancies in their linguistic knowledge and socio-cultural experience in the learning and construction of language, cultural values and practices, and identity through co-learning.