GCSEs and A-levels cancelled in England by the pandemic will be replaced by grades decided by teachers, the exams watchdog Ofqual has confirmed.
Schools can determine grades this summer by using a combination of mock exams, coursework and essays.
There will be optional assessments set by exam boards for all subjects, but they will not be taken in exam conditions nor decide final grades.
Results will be published earlier in August to allow time to appeal.
Schools minister Nick Gibb said the government had devised "the best system possible to ensure there is consistency and fairness in how teachers submit grades for their students".
Asked whether he accepted grades would be inflated this year, he told BBC Breakfast the government had put in place "different checking mechanisms" to ensure there was "consistency".
He added ministers had devised the "best system possible" to ensure "fairly awarded grades at a time when we don't think it's fair for [students] to sit the exams in the normal way."Schools can determine grades this summer by using a combination of mock exams, coursework and essays.
There will be optional assessments set by exam boards for all subjects, but they will not be taken in exam conditions nor decide final grades.
Results will be published earlier in August to allow time to appeal.
Schools minister Nick Gibb said the government had devised "the best system possible to ensure there is consistency and fairness in how teachers submit grades for their students".
Asked whether he accepted grades would be inflated this year, he told BBC Breakfast the government had put in place "different checking mechanisms" to ensure there was "consistency".
He added ministers had devised the "best system possible" to ensure "fairly awarded grades at a time when we don't think it's fair for [students] to sit the exams in the normal way."
Meanwhile, Prime Minister Boris Johnson tweeted on Thursday that "no child should be left behind as a result of learning lost during the pandemic", which was why government had devised a "fair and flexible system" that would ensure all young people "can progress to the next stage of their education or career".
The new arrangements, which will be set out by Education Secretary Gavin Williamson in the House of Commons later, come after a consultation into how best to assess pupils after months of school and college closures.
Last summer, thousands of A-level students had their results downgraded from school estimates by a controversial algorithm, before Ofqual announced a U-turn which allowed them to use teachers' predictions instead.
There will be no fixed share of grades and schools will not be expected to keep in line with last year's results or any earlier year.
But the Education Policy Institute think tank has warned the plans for this year risk "extremely high grade inflation".
Scotland, Wales and Northern Ireland have already announced that exams will be replaced by teacher-assessed grades.
How will the grading system work?
After last year's chaos, the exams watchdog Ofqual and the Department for Education say there will be no algorithm calculating results.
Instead, the grading system will be built around teachers' judgements - with schools allowed to decide on the evidence to be used, such as mock exams, coursework and essays.
If students are unhappy at the outcome of what their school and teachers have decided, they can appeal, with no financial charge expected.
For those still wanting to take written papers, there will be an option of exams in the autumn.
A-level results day will be 10 August, with GCSEs results given out on 12 August.
They are earlier this year to create a "buffer" for appeals, ahead of decisions over university places in the autumn.
Students awaiting the result of an appeal before being granted a university place will be prioritised under this year's system, Mr Gibb said on Thursday.
Before the end of the school year, teachers can tell pupils how they got on in the test papers set by exam boards - but not their final grades.
Will students still have to sit exams?
There will be test papers set by exam boards for each subject, which are intended to inform the judgement of teachers, but will not decide the final grades.
These have been labelled "mini-exams", but Ofqual says the tests, which will be optional for schools to use, should not be seen as exams.
Question papers, which could be from previous exams, will be sent to schools before the Easter holidays and can be taken before 18 June, when schools have to submit grades to exam boards.
The intention is that regardless of how much time pupils might have missed out of school, they will have questions on a topic they will have studied.
These tests will be taken in class rather than exam halls, there is no fixed time limit for their duration and they will be marked by teachers.
What checks are in place?
There will be no fixed share of grades - and schools will not be expected to keep in line with last year's results or any earlier year.
Instead teachers will be expected to award grades based on their professional judgement, drawing on whatever evidence is available.
Schools will be given detailed information about grading and will be expected to ensure consistency between teachers.
Exam boards will check random samples and if there are specific concerns about unusual results, they can investigate and change grades.
What about vocational exams?
Teachers' grades will be used to replace written vocational exams, in the same way as GCSEs and A-levels.
But where there are practical, hands-on skills to be tested, such as for a professional qualification, some of these exams will continue in a Covid-safe way.
The results of some vocational qualifications will be released in the week of 9 August.
Related Articles: