Read this book recently, just putting it out there in case anyone hasn’t come across it yet: http://the-knowledge.org/en-gb/ There’s a lot of useful stuff there, the basic idea is to enable people to develop basic technologies from scratch, a ‘quick-start guide’ to a technological civilisation.

The website also has some interesting prepping ideas on it, e.g the ‘apocalypse-proof kindle’

It also occurred to me while reading it: good quality education in a resilient society would allow people to reproduce something like this. Yet despite almost 2 decades of formal education, a lot of it was completely new to me.

Would have been nice if Dartnell put up the whole book for free on his website but I guess he needs to make a living. It is, however, available for free on archive.org and also z-lib.