Almost half of pupils in England have failed to meet a new tough standard in reading, writing and mathematics.
Official data shows just over half (53%) of 11-year-olds made the grade in reading, writing and mathematics.
This means 47% of pupils are considered not to have made the grade in the 3 Rs by the end of their primary years.
Last year 80% met the required standard in reading, writing and maths – but that was under a system which was dropped this year.
Education Secretary Nicky Morgan says lower results should not be interpreted as a decline in performance by pupils.
This year’s tests were more demanding and were based on a new curriculum.
Read more about this story on the BBC website: Almost half of primary pupils miss new Sats standard | BBC News