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Found one definition

1.                 From Japanese-English FreeDict Dictionary ver. 0.1:
                   
   
   
                   
                     
    [ichi1]  [news1]  [nf08]  課 /(en)tʃˈaɪniːz(ja)lˈe̞tə/,  [ichi1]  [news1]  [nf08] か /kˈä/
   1. (noun (common) (futsuumeishi))
    (noun, used as a suffix)
   lesson
   2. section (in an organization), division, department
   3. (counter)
   counter for lessons and chapters (of a book)