Evidence from primary and secondary schools across Wales, and workplaces involved in the Healthy Working Wales, Corporate Health Standard and Small Workplace Health schemes.
Mae tystiolaeth gan ysgolion cynradd ac uwchradd ledled Cymru, a gweithleoedd sy'n ymwneud â Chymru Iach ar Waith, Y Safon Iechyd Gorfforaethol a chynlluniau Iechyd Gweithle Bach.