The Reception Baseline Assessment (RBA) is a short assessment, taken in the first 6 weeks of a child starting their Reception year.
From September 2021 all schools are required to administer the baseline.
Each child will work through set activities with their class teacher. The activities last for approximately 20 minutes and can be split into smaller chunks of time.
"The purpose of the reception baseline assessment is to provide an on-entry assessment of pupil attainment to be used as a starting point from which a cohort-level progress measure to the end of Key Stage 2 (KS2) can be created."
(DfE February 2020)