There are 240 schools in England where over 90% of students do not speak English as a first language, according to official figures analysed by Sky News.
In the last academic year, Department of Education census figures reveal five primary schools in England - of nearly 17,000 in total - had no native speakers, with 100% of their pupils speaking English as a second language.
Sky News has visited one of the five schools - the Sacred Heart Primary School in Tipton, West Midlands - which has since admitted three native speakers.
Staff at the primary school believe they have a winning formula for teaching children from a diverse community.
English is the second language for 95% of the school's 128 pupils - the vast majority of them with parents from Pakistan or Bangladesh.