What basic, fundamental, essential skills should be taught--but are not now generally taught--in middle and high school?

Computer skills. Students have their phones but phones are a different beast from computers. Only the gamers seem to really be proficient in basic stuff. I had a student who didn't know how to double-space his essay so he hit enter after each line to manually create one.

While computers will likely change and grow, learning computer skills teaches them how to solve computer-based problems that I feel will always be a part of their life from this point forward.

Hypothetical example: "I need to double-space. I don't know the button for that. But I know I can search the menus usually in the help section. I know it is probably one of these buttons and if I hover the mouse over it it will tell me. I know I can google it if I'm really stuck."

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