Mae’r rhan fwyaf o blant rhwng tair a 18 oed yn mynychu ysgol am hyd at 30 awr yr wythnos. Mae hyn yn gwneud ysgolion yn lleoliadau allweddol ar gyfer hybu iechyd meddwl a llesiant cadarnhaol a darparu mesurau atal ac ymyrraeth gynnar yn seiliedig ar dystiolaeth. Mae angen i athrawon gael cymorth a chefnogaeth wrth ymateb i blant sydd ag anawsterau fel pryder, sy’n isel eu hysbryd ac sydd ag anhwylderau gorfodaeth, hunan-niweidiol neu ymddygiad; ac mae gan y GIG ran yn hyfforddi ac ymgynghori ar draws y sectorau; ac wrth ddarparu cymorth yn gynnar mewn ysgolion gan staff sydd wedi’u hyfforddi’n briodol. Gall gwasanaethau mewn ysgolion wella hygyrchedd, ymdrin yn well â straen sy’n gysylltiedig ag ysgol, lleihau’r pwysau ar Wasanaethau Iechyd Meddwl Plant a'r Glasoed (CAMHS) arbenigol drwy ostwng nifer yr atgyfeiriadau amhriodol; a hwyluso diwylliant ehangach sy’n hybu ac yn rhoi gwerth ar iechyd meddwl a llesiant cadarnhaol mewn ysgolion. Mae’r materion hyn yn uniongyrchol gysylltiedig â nodau Deddf Llesiant Cenedlaethau’r Dyfodol 2015, sef sicrhau Cymru iachach ac amcanion llesiant Llywodraeth Cymru i ddarparu gwasanaethau gofal iechyd o ansawdd sy’n addas ar gyfer y dyfodol ac i hyrwyddo iechyd da a llesiant i bawb.
Most children between the age of three and 18 attend school for up to 30 hours a week.  This makes schools key locations for promoting positive mental health and well-being and providing evidence based prevention and early intervention.  There is a need for teachers to have help and support in responding to children experiencing difficulties such as anxiety, low mood, and compulsive, self-harm or conduct disorders, whilst the NHS has a role in training and consultation across sectors; and providing early help in schools by suitably trained staff.  School-based services can improve accessibility; better address school related stress; ease pressures on specialist Child and Adolescent Mental Health Services (CAMHS) by reducing inappropriate referrals; and facilitate a wider culture which promotes and values positive mental health and well-being within schools.  These issues are directly linked to the goals in the Wellbeing of Future Generations Act 2015, namely a healthier Wales and the Government’s well-being objectives to deliver quality health care services fit for the future and to promote good health and well-being for everyone.