Why would you guys go and look at porn, especially at school?
You do realize that's breaking a violation, and can permanently ban your account at school/college? You most likely are gonna end up being kicked out just like a few guys did back at my old school. But if it's something like going onto gaming sites, they probably give you an extra chance.
In my old school, we had a program called LanSchool Monitor, basically used to check our download/upload history, plus an instant view which basically means anyone who uses that program can actually watch every single move you do in just one window. One thing for sure is that they can control your whole PC, meaning they can turn it off, control your mouse etc. Plus, if you've deleted your history, they can still find out what you deleted, and that's how some people got banned from using PC's at our school.
Right now though in college, they use the EXACT same programme, but in college, they aren't that strict as schools are, meaning you can go onto sites like these and others, but not porn or shit like that.
But yeah, at the end of the day, most schools will punish you for that typical offence.