Caught DDoSing School, what can they do?

[Liam]

Basically i ddosed my school afew weeks ago and i wasnt really bothered about getting caught because i didnt really think much about it, and then i started doing it off peoples ipads and taking the network down once again so eventually my school realised that there were no problems with their router its someone taking it down and they traced every account that logged into the site that i used, i told them that i was ddosing a guy who was calling me stuff on skype after we got into an argument because he wouldnt pay for a background i designed him and i copied and pasted the wrong ip from the skype resolver and ended up with schools ip,they deactivated everyones accounts who went onto the site and said they cant reactivate without the head teaches permission, he was supposed to get me out of lesson 2 weeks and they never come, he was supposed to come last week and he didnt so basically im just wondering what he can do? I know that there were better ways for me to ddos them without getting caught and obviously if i was that bothered i would have done it im just wondering what they could do, btw a few weeks ago another kid got into the school system and defaced everything he could had got addresses anything he wanted and he was also caught but not yet been punished, which is worse and who what can they do? cheers