St. Mary's Roman Catholic High School is a co-educational, 11-19 secondary school in Croydon, England. The school is one of the longest established schools in Croydon, having been founded over 140 years ago. It has expanded over the years and now caters for about 750 boys and girls, the majority of whom are Catholic but the school is attended by pupils of other faiths. The head teacher is Patrick Shields. It is the 9th most improved school in the country for GCSE exam passes and the percentages are increasing every year. It is placed as the top third school for progress after last years' results which were the best in school's history with 55% of the pupils achieving 5 A*-C in English and Maths compared to only 41% in 2015. 20% of the students achieved A*-A and 40% of students achieving A*