DEWi was available for uploading files on 14 May 2019, with schools asked to submit data for every pupil on roll at the school on 14 May for the relevant Foundation Phase and Key Stages.
Gofynnwyd i ysgolion gyflwyno data ar gyfer pob disgybl ar gofrestr yr ysgol ar 16 Mai yn barod ar gyfer Profion Darllen Cenedlaethol perthnasol y Cyfnod Sylfaen/Cyfnodau Allweddol.