Ysgolion Meithrin is a movement for the formation and support of Welsh Medium

Welsh medium education

Education delivered through the medium of the Welsh language is known as Welsh medium education .Welsh medium education should be distinguished from the teaching of Welsh as an academic subject. Welsh as a subject is taught as first language in Welsh medium schools...

 Nursery groups. These voluntary groups are often crucial in the subsequent establishment of a Welsh Medium primary school in the area. The movement is particularly active in Anglicized areas of Wales

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

and has had major growth since the 70s. Correct name is Mudiad Ysgolion Meithrin (Nursery Schools Movement)