The aim of this paper is to investigate the relationships between environmental noise levels of schools and a set of academic achievement factors and also, to determine the noise exposure of schools. Secondary schools in Greater London were studied. Four academic achievement indicators were considered and five noise indicators were obtained after processing noise map data. The results show that in the studied schools, the environmental noise levels have almost no significant relationships with those academic achievement indicators. As expected, the secondary schools in Inner London are noisier than those in Outer London, with an average difference of 2dBA.