The best action for primary schools that are "not stepping up to the mark" is for them to be taken over by academy sponsors, according to the Department for Education.
Despite DfE findings that 767 schools are failing to meet the Government's new tougher targets, the data suggested that overall primary schools are improving.
Last year 834 primaries would have fallen below the new standards.
More than 700 primary schools in England fall below the Government's new tougher standards in reading, writing and arithmetic, Department for Education figures suggest.
For the first time, schools are judged on the number of children achieving at least a Level 4 - the standard expected of the age group - in reading, writing and maths.
They must ensure that at least 60% of pupils reach this level in all three subjects and meet national averages in pupil progress.
In previous years, they were rated on reading and writing combined to form an overall English result and maths, as well as progress.
The 767 schools that fail to meet the target are considered under-performing and face being taken over and turned into academies.
A primary school teacher got her baby son's education off to an early start - by giving birth to him in a classroom.
Diane Krish-Veeramany, 30, went into labour a week before she was due while working at Manford Primary School, in Chigwell, Essex.
Three colleagues acted as improvised midwives to help deliver her second child, Jonah, after she came out of a morning meeting.
Feeling the first pangs of labour, Mrs Krish-Veeramany called for her husband, Vijaye Veeramany, to come and pick her up.
Twenty minutes later she had delivered the baby with the help of teaching assistants Dita Gojnovci, Chris Sword and Sam Mustafa.
Russell Hobby, general secretary of the National Association of Head Teachers (NAHT), said the results were "excellent news".
"It shows the hard work that's going on in the system and has been going on for some years."
He said the majority of primaries will not be academies, which shows that schools can improve "no matter what their status".
This year's top-ranking school, for the second year running, was Newton Farm Nursery, Infant and Junior in Harrow.
It gained the highest average points score at 34.1.
- 1. Newton Farm Nursery, Infant and Junior School, Harrow: 34.1
- 2. Grinling Gibbons Primary School, London: 33.9
- 3. Bishop Gilpin CofE Primary School, London: 33.1
Pupils sitting the National Curriculum tests are given a set number of points for the level they achieve.
Level 2 or below is worth 15 points, Level 3 is worth 21 points, Level 4 is worth 27 points, Level 5 is worth 33 points, Level 6 is worth 39 points.
Each pupil's points for English and maths are added up and divided by the number of tests taken to give a school's average points score.
Schools with less than 30 pupils are not included.
A Department of Education spokesman said that the aim of their floor target was to boost standards and "end years of chronic under-performance."
The latest league tables show how more than 15,000 primary schools performed in national curriculum tests - known as SATs - in English (reading and writing) and maths.
Under the Government's current target, schools are considered failing if fewer than 60% of 11-year-olds reach the expected standard - Level 4 - in English and maths SATs tests, and fewer youngsters make two levels of progress in these subjects than the national average.
The national average for English progress this year is 92%, and for maths it is 90%.
Schools that fail to reach this threshold are at risk of being closed and turned into academies.
The latest figures show that of the 521 schools which are below the bar, 45 have already closed, with 37 becoming academies.