I didn't just study at school. I also studied it for 2 further years at college, on an AVCE, where much more stuff was learnt (pity I didn't take half it on-board, I spent too much time boasting how I knew so much yet in reality knew so little), but still in all fairness we didn't do anything that helped me find the problem with my own PC that I built.
Apart from school and college, I did learn stuff from magazines and friends, which builds me up to being able to say I studied ICT for 7 years. Fair enough, the first few years were basic things. Who wants to teach stupid 15-year olds how to build a PC? Not me. Probably some of the same reasoning behind why schools don't teach kids how to do some of the more useful things.
In any case, I no longer know bugger all about PCs, I gave that up after a risk of becoming a big nerd was realised. Now, though, I show off at work instead. Showboating perhaps. Why not I say, my job is terrible. Might as well show off all the knowledge I've gained at my workplace regarding the stuff we do anyway, pointless having it otherwise! At the same time though, it's like most of what I learnt in IT lessons at school, useless knowledge in the real world.
With regards to the overclocking thing, I'd decline the opportunity to have fun with it, mainly now due the fact I cannot remember where to put the jumpers on the pins on the keyboard. I did manage to re-clock an old PC that is now OOU from 120MHz to 200MHz when I upgraded the CPU, but that was it. I've lost all knowledge of how to do it now though!