The school was originally called Epsom County Grammar School for Boys, which then was changed to Glyn County Grammar School for Boys at the instigation of the new headteacher Norman Dawson circa 1953. After its transformation into a comprehensive school it was named Glyn ADT and then Glyn Technology School. Latterly, from 1 April 2011, after its conversion to academy status, the school has been known as Glyn School.
Admissions
As of September 1993, the sixth form began accepting applications from female students, generally from neighbouring girls' school, Rosebery. This experiment was abandoned and started again in 2005. Since then, the female population at the school has grown from a handful to represent around 25% of the sixth-form body. In 2010, the role of Head Girl was established to represent them alongside the male majority of the school.
Rankings
The school's GCSE results reached successive record heights in each of the 7 years to 2013, the school's A level results of 2012 passing the previous best of 2009. The GCSE results in 2012 saw 93% gaining at least 5 GCSEs between A* to C and 86% gaining five or more including English and mathematics. 93% and 87% for 2013, ranking number 2 for two years running in Surrey for state secondary schools. The 2013 results for Glyn boys compared to boys in all Surrey state schools ranks Glyn at number 1.
Current administration
In January 2010, Glyn became a National Support School and between October 2010 and January 2014, Jon Chaloner was executive headteacher of both Glyn and Danetree Junior School. In September 2012 GLF Schools was created as a multi-academy trust comprising Glyn and Danetree.
Students are allocated equally into eight houses upon entry. Coloured school ties represents students' houses, these include: Abbey, Bourne, Carew, Derby, Merton, Oaks, St. Benet and Tudor.
Use
House competitions include sports and academic subjects. The house which accumulates the most merits on these combined factors at the end of every academic year is awarded with the Victor Ludorum trophy.
The prefect system
Each house appoints its own Senior Prefect, a student in the upper sixth. His or her role is to bridge the link between the school's staff and the students within the house. He or she is often responsible for organising and co-ordinating inner-house activities and inter-house competitions. Each Senior Prefect has a small group of prefects who assist. In 2009–10, the school acknowledged the growing female presence in the upper school by conferring the title of Head Girl upon a member of the upper-sixth, alongside the Head Boy and his deputies. In 2011–12, the post of Deputy Head Girl was created.
Assessment
The school was judged Outstanding in 2012, under a reformed and more critical Ofsted inspection regime, the highest category as at the previous inspection. At this time, in each of the four grouped criteria assessed the school was outstanding. In each of the main three subjects analysed, results in 2012 were grouped in the top quintile nationally.
