It would definitely be handy if the students were all taught basic self-defense, but that's not something to lament about in the here and now.

Dick flits through the shadows behind Toushirou, whistling with obvious impressedness at the boy's ice wall. Without pause, he jumps and flips over the ice with an echoing laugh, quick to land on one of the U-men's heads to knock him out instantly before kicking the helmet off the second and sending him crashing head-first into the wall.