"It is not productive to spend an hour learning how to change the font on your computer’s clock. Even if while you’re doing that you’re learning about how computers work, you’re wasting your time and getting somewhere trivial very slowly."
This reminds me of "computer education" programs that just teach how to use MS Word. Yes, this will get you a job, but you'd be learning at a more fundamental level with Squeak eToys. Or some of this:
