▁( 5 5 . 8 % ▁Below ▁Basic ) ▁ 2 0 1 8 ▁- ▁ 1 8 . 2 % ▁Advanced / Pro fic ient ▁( 5 5 . 1 % ▁Below ▁Basic ) ▁ 2 0 1 7 ▁- ▁ 3 4 . 2 % ▁Advanced / Pro fic ient ▁( 3 7 . 6 % ▁Below ▁Basic ) ▁ ▁Special ▁education ▁In ▁December ▁ 2 0 1 0 , ▁New ▁Castle ▁Area ▁School ▁District ▁administration ▁reported ▁that ▁ 6 0 0 ▁pup ils ▁or ▁ 1 7 . 5 % ▁of ▁the ▁district ' s ▁pup ils ▁received ▁Special ▁Education ▁services , ▁with ▁ 3 6 . 8 % ▁of ▁the ▁identified ▁students ▁having ▁a ▁specific ▁learning ▁dis ability . ▁In ▁December ▁ 2 0 0 9 , ▁the ▁District ▁administration ▁reported ▁that ▁ 6 0 0 ▁pup ils ▁or ▁ 1 7 . 3 % ▁of ▁the ▁district ' s ▁pup ils ▁received ▁Special ▁Education ▁services , ▁with ▁ 3 7 . 5 % ▁of ▁the ▁identified ▁students ▁having ▁a ▁specific ▁learning ▁dis ability . ▁Special ▁education ▁services ▁in ▁the ▁Commonwealth ▁are ▁provided ▁to ▁students ▁from ▁ages ▁three ▁years ▁to ▁ 2 1 ▁years ▁old . ▁In ▁the ▁ 2 0 1 0 - 1 1 ▁school ▁year , ▁the ▁total ▁student ▁en roll ment ▁was ▁more ▁than ▁ 1 . 7 8 ▁million ▁students ▁with ▁approximately ▁ 2 7 5 , 0 0 0 ▁students ▁el ig ible ▁for ▁special ▁education ▁services . ▁Among ▁these ▁students ▁ 1