「補習」既英文

補習：
coaching ; to coach someone for...

補習班：
a class for supplementary schooling ;
continuation class or course

補習教育：
supplementary education

補習課程：
remedial course

補習學校：
continuation school ;
extension school

補習社：
an institute

補習 is called tutoring.

ex:I have tutoring after school.

補習 in English is tutorial.

take tutorial class
^^