multiplication tables (even math classes where calculators/computers are not used), performing math "in your head" and using math short cuts, cursive writing, letter writing, how to answer a telephone, and similar. Sometimes the power goes out in a whole county and people cannot function after their Smartphone batteries die. Should we be concerned?
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The 1965 Blackout! I remember what havoc that caused. I shudder at what that would do today and agree with all you say, especially about teaching students to research answers for themselves. Thank you for your comments and reminders!
Yes, not being able to do some math in one's mind is an obstacle when calculators die, for sure. I never thought about govt control, but it could happen and could happen more strongly when the people lose survival skills.
I remember when Cincinnati schools changed "homemaking" to "single living" so teen boys would feel more comfortable with the lessons for practical tasks, but I bet that class is gone as well. Thanks for reminding me of that!