Clarifying CLIL for the English teacher

In many secondary schools, CLIL is being taught by subject teachers. Each subject has its own vocabulary and grammar and text types. What can an English language teacher do to integrate the language students need for subjects in their English lessons? How can an EL teacher support the subject teachers and language learners at their school or institution? This article illustrates and describes ideas with a sample course book subject page (from a history or biology course book), with language highlighted from CLIL Activities (CUP 2012). Different areas an English teacher can help the subject teacher with (e.g. pronunciation/grammar/vocab/ functions) are considered.
Practical language activities for the English lesson before the history lesson and after the history lesson are suggested.