Over the course of the students placement, you would have had time to see what worked well and identified areas for improvement. This is normal as no placement is ever the same. It is also a great way to progressively improve and build upon hosting of placements.
Breaking it into four areas will help. Think of it as a progressive circle:
Student placement commences
Learnings during the course of the placement
Review and prepare for next placement
The University appreciates feedback. Feel free to feedback to your Academic contact what worked well and areas for improvement.