Ysgol Glan Clwyd (or Ysgol Uwchradd Glan Clwyd) is a Welsh medium secondary school, and was the first of its kind. It opened in 1956, initially at Rhyl on the coast before moving inland to St Asaph in 1969 [1]. It is overseen by Denbighshire Local Education Authority.
In 2006 it had 833 students, of whom 108 were in the sixth form. A government inspection reported that although 70% students are from homes where English is the main or only language spoken, 95% of the students spoke Welsh as well as a native speaker. All subjects are taught in Welsh apart from a few in the sixth form.