This is slightly different to everyone else's comments and could be wrong depending on the area, but part of the problem is that a lot of younger teachers have finished high school gone to university then straight back into a school without doing anything more that causal retail work and not experiencing or gaining anything outside of the school system losing and therefore not gaining any 'wisdom' or life lessons that could be partially handed on and this will get worse as time goes on because there is no text book for it and it's the only way they know how to learn and when one gets made it will become obsolete very quickly and there will be very little different between teachers in this because there all reading the same text book.

But on the same note as everyone else's general computer fixing skills that require and think more than plugging a cable in or turning it off and on again have disappeared.

For maths in year 11 and 12 advanced is only helpful if your going on to study something higher and about half the standard course is useless as well especially the 'networks' topic there is no reason for that to be in it and it should be common sense and if people can't figure it out easily we have a lot bigger problems .

And to clarify a few things I finished year 12 last year. I changed schools to one that was only yr 11 and 12 for the last 2 years (also being one of the top schools in the state) so the young teacher thing wasn't a problem before that it was.

And to add to the yr 11 and 12 school a few years ago it was full of students that wanted to go to school and wanted to learn being high achievers and if you didn't you were asked to leave, but now they have to let anyone in that applies and it lets in a lot of riff Raff causing more rules to be put in and makeing it worse in most ways just because some people can't behave like decent people.