One of the activities I got to both observe and participate in was the Celtic War Cries. This is a last-week-of-school tradition at BSSD, and it is pretty awesome. Everyone draws a traditional Celtic tribal motto/war cry from a bag, then yells it while driving a sword into the sand.
These war cries were what each tribe was about, what each member aspired to, and they are still applicable today. For instance, the one I drew was, “Not having followed mean pursuits.” I certainly hope that will always be true of me.