Two teaching unions are due to call for Sats tests and school performance tables to be scrapped.
The National Union of Teachers (NUT) and the National Association of Headteachers (NAHT) will call for this year's exams to be voluntary and for English, maths and science standards to be measured through teacher assessment.
The Government has already scrapped externally-marked Sats for 14-year-olds (key stage three) and a joint statement from the unions will today call for the key stage two exams taken by 11-year-olds to be dropped.
The unions believe teacher assessment should be used at all assessment levels from key stage one (age seven) upwards.
The statement say standard tests are "narrowing the curriculum" because teachers tailor classes towards passing the exam so the school meets targets.
It adds that teachers are also likely to concentrate their efforts helping borderline pupils to achieve a higher grade so the school performs better in tables.
A statement to be issued at the launch of the joint conference The Future of Assessment in central London will say school performance tables should be scrapped as they paint "an erroneous picture of school achievement and damage the confidence and stability of school communities".
Christine Blower, acting general secretary of the NUT, said: "I see no reason why the Government in England should not adopt our joint proposals.
"Against all the evidence, it has clung to an outdated system which discourages innovation and inhibits children and teachers alike. Teachers want to concentrate on their teaching and pupils on their learning."
Mick Brookes, general secretary of the NAHT, said: "The proposals outlined by NAHT and NUT provide a robust and professional way forward. This will ensure that children themselves will have their efforts properly recognised."
