The debate has been going on for some time now, hasn't it?
And included in the debate should be the impact on schools which fall into this category, and why they are doing so well. From the report in the Telegraph is this telling point:
"Of the ten schools with the highest proportion of children who do not speak english as their first language, all but two are outside London. All but one are rated as either good or outstanding by Ofsted, the schools watchdog."
And so as not to confuse matters, it might be helpful to understand the standard of English these pupils have as opposed to their parents.
Parents need to have a good basic grasp of English, otherwise they will be unable to help with homework and read report cards etc. However, just because a child speaks one language at home and another in school doesn't lend itself easily to the debate on immigration.
Especially when those schools are rated as 'good' or 'outstanding'.