Pupils may have to sit additional tests next year so researchers can measure the full extent of lockdown learning losses.
The Department for Education plans to research the impact covid-19 disruption had on the academic development of youngsters, including how pupils are progressing next year to recover lost learning.
Government plans are for all pupils to return into full-time education from September.
Any data collected from a sample of schools would definitively not be used for accountability purposes
Details on the research states there are two broad approaches to obtain such data: either by supplementing existing assessments schools will run next year with additional tests, or by running a specific research programme across a sample of schools using commercially-available assessments.