lesson -
a unit of instruction; "he took driving lessons"
pedagogy,
teaching,
instruction the profession of a teacher; "he prepared for teaching while still in college"; "pedagogy is recognized as an important profession"
exercise,
example the activity of exerting your muscles in various ways to keep fit; "the doctor recommended regular exercise"; "he did some exercising"; "the physical exertion required by his work kept him fit"
word of advice,
admonition,
monition,
warning cautionary advice about something imminent (especially imminent danger or other unpleasantness); "a letter of admonition about the dangers of immorality"; "the warning was to beware of surprises"; "his final word of advice was not to play with matches"
lesson -
the significance of a story or event; "the moral of the story is to love thy neighbor"
A lesson is a structured period of time where learning is intended to occur. It involves one or more students (also called pupils or learners in some circumstances) being taught by a teacher or instructor. A lesson may be either one section of a textbook (which, apart from the printed page, can also include multimedia) or, more frequently, a short period of time during which learners are taught about a particular subject or taught how to perform a particular activity.
OmegaWiki Dictionary
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lesson A relatively short period of learning or teaching.
