yle - C ass id y ▁School , ▁officially ▁Co yle ▁Cass id y ▁Memorial ▁High ▁School ▁and ▁Middle ▁School ▁Div isions ▁( former ly ▁St . ▁Mary ' s ▁High ▁School , ▁M ons ign or ▁Co yle ▁High ▁School , ▁and ▁Co yle ▁and ▁Cass id y ▁High ▁School ) ▁is ▁a ▁private , ▁Catholic ▁Dioc es an ▁school ▁located ▁in ▁Ta un ton , ▁Massachusetts , ▁US . ▁ ▁The ▁school ▁has ▁been ▁a ▁co - ed uc ation ▁middle ▁and ▁high ▁school ▁facility ▁since ▁ 2 0 1 4 . ▁ ▁Co yle ▁serves ▁students ▁living ▁within ▁and ▁beyond ▁the ▁Gre ater ▁Ta un ton ▁Area . ▁ ▁History ▁The ▁school ' s ▁history ▁dates ▁back ▁to ▁ 1 9 1 1 , ▁when ▁M ons ign or ▁James ▁Co yle , ▁past or ▁of ▁Saint ▁Mary ' s ▁Church , ▁established ▁Saint ▁Mary ' s ▁High ▁School . ▁ ▁The ▁high ▁school ▁grew , ▁and ▁by ▁the ▁early ▁ 1 9 3 0 s ▁the ▁need ▁for ▁a ▁larger ▁school ▁was ▁apparent . ▁ ▁In ▁ 1 9 3 3 , ▁shortly ▁after ▁M ons ign or ▁Co yle ' s ▁death , ▁M ons ign or ▁Co yle ▁High ▁School ▁opened ▁on ▁Summer ▁Street , ▁staff ed ▁by ▁the ▁Brothers ▁of ▁the ▁Holy ▁Cross . ▁ ▁The ▁boys ' ▁population ▁transferred ▁to ▁Co yle , ▁and ▁the ▁girls ' ▁population ▁stayed ▁at ▁Saint ▁Mary ' s ▁under ▁the ▁guidance ▁of ▁the ▁Holy ▁Union ▁Sister s . ▁