Open sourcing material from within a company takes a lot of time and effort. It has to be a reasonably high standard to be something that can represent the comp

Open sourcing material from within a company takes a lot of time and effort. It has to be a reasonably high standard to be something that can represent the company publicly. Not everything has to be open sourced -- why shouldn't they feel free to run their coding class internally? Anyway, it would just be another jumble of intro material and tutorial.