For example, data collection on educational achievement was not collected in 2020 and 2021 as young people’s learning was affected by school closures.
Er enghraifft, ni chafodd data ar gyflawniad addysgol eu casglu yn 2020 a 2021 gan fod y ffaith bod ysgolion wedi gorfod cau wedi effeithio ar ddysgu pobl ifanc.