Ministers face Sats scrap pressure
Ministers have come under renewed pressure to scrap Sats as results showed reading standards among 11-year-olds slipped for a second consecutive year.
More than a third of pupils also left primary school without a proper grasp of the basics in reading, writing and maths, National Curriculum test results revealed.
But youngsters are getting better overall at English and maths.
The Government was forced to disregard results in more than 20 local authorities, which were rendered "statistically unrepresentative" by a boycott which saw tens of thousands of children not sitting the tests.
The results showed only 65% reached the standard expected for their age in reading, writing and mathematics combined.
Christine Blower, of the National Union of Teachers, dismissed the test results as an "irrelevance" and praised the quarter of English schools which pulled out.
She added: "As much as £20 million in public money would be saved by a move to sample testing, which would be significantly more valid and not create a distorting effect on the curriculum.
"Parents are more interested in their children's happiness, security and progress across the curriculum than they are in the results of the deeply flawed Sats."