I could've sworn you were older than me Braden! I never knew you were younger.
That aside, in my school, it's tradition to come in in fancy dress on the last day (in both year 11 and year 12). Last year I dressed up as Harry Potter. Maybe your year could dress up? It's really fun! It just ended everything n such a nice, positive and fun note. The day was just fantastic.
The best costume I saw was this girl who came in as a pregnant nun. I laughed so hard I cannot omfg.