For example, on the topic of "ancient Egyptian culture", "the life of Alexander the Great", "reasons of the Second World War" or something else. That is, the student looks for the information (writes it down if the teacher asked him to do it in written form). Then, the next history lesson, he tells the class what he has prepared.
Update:
I mean a personal assignment for some student besides his usual homework which is given to all class. And that student must tell his personal assignment to all other students in his class at the next lesson.