Something that serves as a warning or encouragement.
A learning task assigned to a student; homework.
A severe lecture; reproof; rebuke; warning.
A section of learning or teaching into which a wider learning content is divided.
A section of the Bible or other religious text read as part of a divine service.
Something learned or to be learned.
An exercise; a composition serving an educational purpose; a study.
To give a lesson to; to teach.
An international distress signal used by shipping and aircraft.