رَاجِعْ دَرْسَكَ قَبْلَ الْمُنَاقَشَةِ.
Review your lesson before the discussion.
As a teacher's friendly suggestion, the imperative can function as guidance (irshād): it directs the learner toward a practical benefit. In a mandatory examination protocol, identical words could carry a different level of authority and obligation.
The imperative morphology alone therefore does not establish one fixed legal or rhetorical force. Interpret it in relation to the speaker's authority, the listener's needs, and the specific conversational purpose.