Estyn yw swyddfa Arolygiaeth Ei Fawrhydi dros Addysg a Hyfforddiant yng Nghymru.Ein gweledigaeth yw gwella ansawdd addysg a hyfforddiant a deilliannau i’r holl ddysgwyr yng Nghymru.Ein cenhadaeth yw cynorthwyo darparwyr addysg a hyfforddiant i ddatblygu diwylliant o hunanwella a dysgu trwy ein cyngor, arolygu a meithrin gallu.Rydym ni’n arolygu ansawdd a safonau mewn:● ysgolion a lleoliadau meithrin a gynhelir gan, neu sy’n cael arian gan awdurdodau lleol● ysgolion cynradd● ysgolion uwchradd● ysgolion arbennig● unedau cyfeirio disgyblion● ysgolion annibynnol● ysgolion pob oed● addysg bellach● colegau arbenigol annibynnol● dysgu oedolion yn y gymuned● gwasanaethau addysg llywodraeth leol● addysg a hyfforddiant athrawon● Cymraeg i oedolion● dysgu yn y gwaith● dysgu yn y sector cyfiawnderEstyn is the office of His Majesty's Inspectorate for Education and Training in Wales.Our vision is to improve the quality of education and training and outcomes for all learners in Wales.Our mission is to support education and training providers to develop a self-improving and learning culture through our advice, inspection and capacity building.We inspect quality and standards in:● nursery schools and settings that are maintained by, or receive funding from, local authorities● primary schools● secondary schools● special schools● pupil referral units● independent schools● all-age schools.● further education● independent specialist colleges● adult community learning● local government education services● teacher education and training● Welsh for adults● work-based learning● learning in the justice sector