▁of ▁ 6 9 6 ▁staff ▁members ▁involved ▁in ▁making ▁the ▁problems . ▁A ▁member ▁of ▁the ▁problem - making ▁group ▁is ▁paid ▁around ▁$ 3 0 0 ▁per ▁day . ▁ ▁The ▁subjects ▁of ▁ 2 0 1 6 ▁were : ▁National ▁Language , ▁Mathemat ics , ▁English ▁language , ▁Korean ▁History , ▁Social ▁Studies / S cience / V oc ational ▁Education , ▁and ▁Foreign ▁language / H anja . ▁Stud ents ▁can ▁choose ▁from ▁all ▁or ▁some ▁of ▁the ▁subjects . ▁The ▁subjects ▁Mathemat ics ▁is ▁also ▁divided ▁into ▁type ▁Ga ( 가 ) ▁and ▁type ▁Na ( 나 ). ▁Stud ents ▁can ▁choose ▁from ▁which ▁test ▁to ▁take . ▁ ▁Korean ▁History ▁is ▁a ▁required ▁subject , ▁and ▁if ▁students ▁do ▁not ▁take ▁it , ▁all ▁the ▁scores ▁will ▁be ▁invalid . ▁ ▁The ▁subject ▁Social ▁Studies ▁is ▁further ▁divided ▁into ▁Life ▁and ▁Eth ics , ▁Eth ics ▁and ▁Th ought , ▁Geography ▁of ▁Korea , ▁Geography ▁of ▁the ▁world , ▁History ▁of ▁Eastern ▁Asia , ▁World ▁History , ▁Law ▁and ▁Polit ics , ▁Society ▁and ▁Culture , ▁and ▁Econom ics . ▁Stud ents ▁can ▁choose ▁two ▁subjects ▁out ▁of ▁those . ▁In ▁the ▁Science ▁section , ▁students ▁can ▁choose ▁from ▁Physics ▁ 1 , ▁Chem istry ▁ 1 , ▁Bi ology ▁ 1 , ▁Earth ▁Science ▁ 1 , ▁Physics ▁ 2 , ▁Chem istry ▁ 2 , ▁Bi ology ▁ 2 , ▁and ▁Earth ▁Science ▁ 2 . ▁Stud ents ▁can ▁choose ▁two ▁subjects ▁out ▁of ▁those