This chapter introduces the framework of a model of inclusive pedagogy that consists of four key dimensions: attitudinal inclusion, academic inclusion, linguistic inclusion and social inclusion. We illustrate the issues through reference to teacher data elicited at the project secondary schools. We discuss the prevalence of linguistic diversity in English schools that makes teachers’ knowledge about such language diversity essential to effectiveness in the classroom and, in light of this, we identify key forms of ‘bilingual assistance’ which support EAL pedagogy. The final section of the chapter presents an outline of a teacher knowledge framework which we argue needs to form the basis of teacher professional development in the EAL context.