Chesham Grammar School, formerly Chesham High School, is a co-educational grammar school in Chesham, Buckinghamshire. There are about 1200 students aged between eleven and eighteen, including nearly 350 in the sixth form. The school was founded as Chesham Technical School in 1947, renamed Chesham High School and in 2010 it became Chesham Grammar School. In August 2011 the school became an academy and in 2014 it was awarded outstanding in all categories by OFSTED.