Hyde et al. consider that a "communicative language teaching" approach is required when teaching English as an additional language. On page 53, the competencies that the teacher is trying to develop are listed.
Below is a lecture from Edgehill University in England which explores EAL and the various approaches to teaching EAL.
Here is a shorter video from AITSL which looks at how a teacher has adapted his practice in order to engage students from an EAL background:
