Chronically malnourished children struggle to read and write simple sentences regardless of their level of schooling, according to research by Save the Children.
Eight-year-olds who are stunted by malnutrition are 19% more likely to make a mistake while reading a simple sentence, the report Food for Thought said.
Stunted children are 12.5% more likely to make a mistake writing a simple sentence and do 7% worse on basic maths questions.
The findings, based on research with thousands of children in Ethiopia, India, Peru and Vietnam, come 10 days before a global nutrition summit in London and ahead of this year's G8.
More top news
Immortalised in the film Zulu, the Battle of Rorke's Drift is an iconic episode of British military history.
Fans and friends of Joe Cocker paid tribute to the Sheffield-born star's long career and his passionate, distinctive voice.
It's going to be turning colder for everyone over the next few days with a band of rain moving southwards across the UK.