As I see Exercism students grapple with more realistic problems which are less algorithmic and more potentially OO (in this case - https://github.com/exercism/pharo-smalltalk/blob/master/dev/src/Exercism/Tou... <https://github.com/exercism/pharo-smalltalk/blob/master/dev/src/Exercism/Tou...> ), I am wondering what we point people towards to learn about OO, identifying objects and more importantly responsibilities these days? There is the early Beck CRC paper - but looking at it again, I wonder if its a bit cursory for people who missed the whole OO discovery years ago, and are now faced with competing advice on how to write good programs (much of which seems to eschew OO these days - rather unfairly I think). Any good references come to mind? As Iâll build up a list that I can point people to, that hopefully puts them in a better place to solve these more interesting and hopefully rewarding problems. Tim Sent from my iPhone