Most of the teaching at the office involved the regular processes, like giving appropriate tasks, recommending learning materials, and collaboratively reviewing

Most of the teaching at the office involved the regular processes, like giving appropriate tasks, recommending learning materials, and collaboratively reviewing work (their and ours). And of course, answering their questions. I never tried to teach, or have been taught, something like a course (even a mini-course) in anything in the workplace. But then again I don't believe most developers are qualified to do that (I don't mean "credentialed").