MCHS

• Ehime Prefectural Matsuyama Central Senior High School
• Madison Central High School (Kentucky)
• Madison Central High School (Mississippi)
• Madison County High School (Virginia)
• Malden Catholic High School
• Mallard Creek High School
• Manheim Central High School
• Manitowoc, Wisconsin
• Maria Carrillo High School
• Marian Catholic High School (disambiguation)
• Marin Catholic High School
• Marine Corps Common Hardware Suite
• Marquette Catholic High School (disambiguation)
• Martin County High School
• Marystown Central High School
• Mascoutah Community High School
• Massena Central High School
• Mayde Creek High School
• Mayo Clinic
• McCollum High School
• McHenry East High School
• McHenry West High School
• McMinn Central High School
• McMinn County High School
• Mcauley Catholic High School
• Mearns Castle High School
• Memorial Composite High School
• Memphis Catholic High School
• Meols Cop High School
• Michigan City High School
• Middle College High School (disambiguation)
• Middle Creek High School
• Midwest City High School
• Milken Community High School
• Mill Creek High School
• Milwaukee County Historical Society
• Ministry of Emergency Situations (Russia)
• Minooka High School
• Mira Costa High School
• Monkseaton High School
• Monroe Catholic High School
• Montini Catholic High School
• Moore Catholic High School
• Moreau Catholic High School
• Morgan City High School
• Morinville Community High School
• Morris High School (Illinois)
• Mount Carmel High School (San Diego)