The reading performance of children in England has fallen from third to 19th in the world in a major assessment.
The Progress in International Reading Literacy Study (Pirls), undertaken every five years, involved children aged about 10 in 40 countries.
Scotland also fell, from 14th to 26th. Russia, which matched it last time, was top of the overall achievement table.
Analysis of the England results said children were spending more time on computers and reading less for fun.
'READING LITERACY'
First run in 2001, it involves data from a sample of pupils, their parents and their teachers and head teachers.
In England, the Department for Children, Schools and Families commissioned a separate report on the findings, from the independent National Foundation for Educational Research (NFER).
READ THE ENGLAND REPORT
After seeing the 2006 results the Children, Schools and Families Secretary, Ed Balls, said parents must do more.
Key findings:
There had been significant increases in the proportion of English 10-year-olds with the "least positive" attitudes to reading and who said they very seldom read stories or novels outside school.
"As parents we have to get the balance right and as a society we have to send the right messages about the value of reading to our children"
"Parents are worried about striking the right balance between play, reading, TV and computer games at home," he said.
"This study shows that our highest achieving children are reading less with children's busy days leaving less time for books at home.
"As parents we have to get the balance right and as a society we have to send the right messages about the value of reading to our children."
TVs and mobiles
The government had brought in phonics across the primary curriculum and introduced one-to-one tuition and small group schemes for those who needed extra help, Mr Balls said.
Today's 10-year-olds had more choice about how to spend their free time.
"Most of them have their own TVs and mobiles, and 37% of our 10-year-olds are playing computer games for three hours or more a day - more than in most countries in the study.
"That's why I'm calling today for everyone's help to get our children reading more and to kick-start a new national debate about the value of reading."
The general secretary of the NASUWT teachers¿ union, Chris Keates, agreed that reading standards were not the responsibility of schools alone.
"Parents need to recognise the importance of children reading regularly outside school and their responsibility to send them to school ready to learn."
Resources
Liberal Democrat schools spokesman David Laws said ministers should be ashamed.
"It suggests that all of its recent strategies to make children read more have been ineffective," he said.
Shadow children¿s secretary Michael Gove said: "It's time the government stopped blaming parents and accepted the case we've been making for a new focus on teaching reading using tried and tested methods, with a test after two years in primary school to ensure our children are being taught properly."
Scotland's Minister for Schools and Skills, Maureen Watt, said she was pleased its most able pupils ranked amongst the highest achievers in the international study.
"However, there is much to do to close the gap between the best and worst performers in Scotland which has remained persistently large," she said.
"The report also shows what this government already knows - that pupils in schools in areas of deprivation don't do as well. We are determined to improve the situation we have inherited."
PARTICIPATING COUNTRIES
(* also participated in 2001)
Austria
Belgium (Flemish)
Belgium (French)
Bulgaria*
Canada+
Chinese Taipei
Denmark
England*
France*
Georgia
Germany*
Hong Kong*
Hungary*
Iceland*
Indonesia
Iran*
Israel*
Italy*
Kuwait
Latvia*
Lithuania*
Luxembourg
Macedonia*
Moldova*
Morocco*
Netherlands*
New Zealand*
Norway*
Poland
Qatar
Romania*
Russian Federation*
Scotland*
Singapore*
Slovak Republic*
Slovenia*
South Africa
Spain
Sweden*
Trinidad and Tobago
United States*
+ In 2001 the provinces of Ontario and Quebec participated. These were joined in 2006 by Alberta, British Columbia and Nova Scotia.
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