Original TWI Manuals are available here:
http://www.trainingwithinindustry.net/JI.html
and can all be downloaded as PDF files for you.
"Deep practice is built on a paradox: struggling in certain targeted ways -- operating on the edges of your ability, where you make mistakes -- makes you smarter."
"Before we make product, we make people."
What capabilities must we ensure are embedded in our people, in ourselves?