The school first opened in 1957 as Thirsk Grammar and Modern School, with space for around 700 pupils. Thirsk school (Image: ARCHIVE)Organisers say the event will give former pupils, current families and members of the wider community the chance to celebrate together, and dust off their flares for the occasion. Thirsk School 50th anniversary in 2007 - Ryan Petfield shows off the emblem he designed. Balloon launch for 50th anniversary of Thirsk School in North Yorkshire. Headteacher of Thirsk School and Sixth Form College, Emma Lambden, with pupils (Image: THIRSK SCHOOL)“It has been a place where friendships have been made, ambitions have been sparked, and generations of local families have built lasting memories.