In addition, all students follow a course in Physical Education and PSHE, which includes Careers Guidance, Ethics & Philosophy and Citizenship.

The House names are Godrevy, Longships, Lizard, Wolf Rock and Pendeen which are all lighthouses off the coasts of Cornwall.

In 1919, the girls' school moved to new premises in an old Victorian house in Tolcarne Road, Newquay.

The Girls' Grammar School was demolished in 1969 to make way for the new police station and Magistrates Courts.

The school was built to accommodate 450 pupils and it wasn't long before this number was attending the school, drawn from all areas surrounding Newquay, from St Columb Minor, St Columb Major, Summercourt, Fraddon, Indian Queens, Perranporth and many other places.

Within two or three years the number of pupils had risen to 600 and classes were being held in all sorts of odd corners – under the stairs, on the stage, in the medical room.

In 1969 work was begun on presenting the new school and the plaque near the entrance commemorates the opening ceremony in September 1969 by Alice Bacon who was the Minister of Education and Science at the time.

Today, Tretherras provides a comprehensive education for over 1,620 pupils aged 11–18 [including 280 in the Sixth Form] from Newquay and the surrounding area.