after school (at the end of the day)

subject; theme; issue; matter

homework; assignment

task; challenge; problem; question

daily routine; daily work; daily lesson

Common noun; Noun, used as a suffix

lesson

Common noun; Noun, used as a suffix

section (in an organization); division; department

Counter

counter for lessons and chapters (of a book)

section manager; section chief

to impose (a tax, fine, etc.); to levy; to assign (a task, duty, etc.); to give; to set

(school) subject; curriculum; course

item; heading; entry

Suru verb - special class

to impose (a tax, fine, etc.); to levy; to assign (a task, duty, etc.); to give; to set

charging (a fee); billing; charge

Colloquial

paying for virtual goods or premium features (in a video game, on a social networking service, etc.); microtransaction

course; curriculum