"Chester's Mill Middle School"@en . "Chester's Mill Middle School is a school in Chester's Mill, Maine. The School provides 6th, 7th, and 8th grade educations to students coming up from East Street Grammar School, preparing them to attend Mills High School."@en . . "Chester's Mill Middle School is a school in Chester's Mill, Maine. The School provides 6th, 7th, and 8th grade educations to students coming up from East Street Grammar School, preparing them to attend Mills High School."@en .