Why is it there is no standard training curriculum?
Because the development of it is one of the hoops that you jump through to get the approval.
The caa make you have each one different. If you use an already appoved one it will just get thrown back at you.
Its the same with AOC's and it gets to the stupid position that the same bloke writing the part A's and B 's get them knocked back and told to change something which they had been previously been told to put in for another AOC.