School houses in the old Grammar were Tudor (Blue), Llewellyn (Green) and Glyndwr (Red).

The Grammar School had been small (circa 350 pupils) with 2 forms per year and an Upper and Lower Sixth.

First teachers: Lillian Armitage B.A., Lilian M. Davies B.A., Thomas Jacob Jones B.A., Thomas Samuel B.Sc., Miss E.M. Williams Mr T. Samuel Higher Elementary School, 4th Sep 1919 to 8th Sep 1919 Mr Charles Davies B.Sc.

Higher Elementary School 21st Oct 1919 to 01st Jan 1921 Thomas Jacob Jones officially appointed new Head.

It had a population of approximately 710 pupils aged 11–18 in its last year of full service, which made it the smallest secondary state school in Bridgend.

Gavin Thomas: former Welsh international rugby union flanker, who was capped 24 times for Wales.

With 100 test match appearances he was the most capped Welsh rugby union player until he was overtaken by Stephen Jones in September 2011.

He was born in Nantymoel near Bridgend and was a member of the Cardiff Amateur Athletic Club Ian Hamer, British former long-distance runner.

Windsor Davies (actor) was born in Canning Town, Essex, to Welsh parents, who returned to their native village of Nantymoel in 1940.

Davies' best-known role was as Battery Sergeant Major Williams in the British sitcom It Ain't Half Hot Mum (1974–1981) Beth Edwards - Award winning BBC news and sport journalist and producer.

Professor Peter John,Vice Chancellor of the University of West London and awarded CBE in 2019' For many years, Ogmore School operated as a partnership with Ynysawdre in order for the two schools to offer a wider choice of subjects and opportunities to those pupils who chose to return for the sixth form.

However, in 2010, Bridgend County Borough Council, passed a vote and decided to merge the two schools coming into effect in September 2011.