Mentone Grammar School (formerly known as simply The Boys' Grammar in the local community) is an independent, Anglican co-educational grammar school in Mentone, a suburb of Melbourne, Victoria, Australia.HistoryFounded in 1923, Mentone Grammar remained a boys only school until 2006. Prior to this, the school hierarchy announced, in July 2005, its co-educational intent after a merger proposal put forth by the Board of Management was rejected by nearby Mentone Girls' Grammar School, its sister school.The School has adopted a parallel learning approach, where boys and girls are together from Kindergarten-Grade 4, from Grade 5-Year 8 the two are separate, and in the Year 9, 10 & VCE years there are mixed classes again.HeadmastersHenry TonkinCharles ThoroldLionel LargeKeith JonesNeville ClarkTim ArgallMal Cater (current)Cadet unitThe Mentone Grammar School Cadet Unit is an Australian Army Cadets Unit based in the school, founded in 1943. It once had a strength of nearly 400, due to the compulsory nature of service from halfway through Year Eight to halfway through Year Eleven. This made it one of the biggest Cadet units in Australia. However the emphasis once placed on the cadet unit is no longer fostered. The AAC Training Management Package (TMP) is not completed within the training sessions. This is due to time shortages with reduced time made available and frequency of sessions. Participation remains compulsory for Year Nine, but this is insufficient for TMP completion.