What comparative data will it yield?
The direct assessment of children will yield data on the following domains at the start and the end of the year.
Early reading
Early mathematics
Short term memory
Physical development
Personal, social and emotional development
Each of these domains will be related to age, home background, first language and pre-school experience. This will allow each country's data to be reported in a contextualised fashion.
An example can be seen in the report below: