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Remote Ready Biology Learning Activities has 50 remote-ready activities, which work for either your classroom or remote teaching.
Math and science as a story
Just adding to the idea that math+science aren't universal -- If math and science is a story, then numbers and symbols are the means of telling the story...and that has had different variations, it hasn't always been arabic numerals. At the moment I can't imagine a more efficient system, but it would be so difficult trying to do multiplication with roman numerals.