It's also probably good to make sure students know how to figure using a pencil and paper because pulling a calculator out on a job site is pretty impractical.
Not sure I agree with that last point... you probably have one in your pocket already (phone app). Though I'm strongly against electronic devices as core education materials in K-6 especially.
Thank you for the recommendation. That’s an interesting topic. I’m pretty full right now so unfortunately even getting into Linux and NT is a bit hard for me. I was reading VFS but bogged down due to lack of time :/
I also want to get into Solaris, too, because it introduces a lot of ideas back then.