On the front, we would like an image of some playground equipment with the SJU Hawk flying overhead. The provided logo on the back can have a graduation cap - and some space to add sponsors.
What to avoid
No
References
Stock images
Client requested you avoid using stock for this contest.
Stock images are licensed photos and vector files. Please tell the client before you submit designs using stock images
If you use fonts that require a license, confirm with the client they're ok with it. For licensing reasons, it is better to provide your client with information on how to acquire the font rather than providing the actual files.