To make sure they don't miss out on anything important, students whose teacher uses a math textbook from KST, for example, will often buy workbooks from Nani or Hanlin. With so many different versions available, teachers and students could be even more stressed out than they are now about not being able to cover all the material that's out there.
為了確保孩子沒有「漏學」什麼，可能老師課堂上的數學課本是康軒版，買的自修是南一版和翰林版，「版本太多念不完」的困擾，將比現在還嚴重。