I’m not sure I completely agree with the number-line-only approach, but I’m definitely sympathetic to it. It reinforces the idea that fractions are numbers like any other numbers, and not pieces of pizza.
Gotta say, every time I go out and look at the moon I can’t help but wonder what would happen if it somehow exploded. Then I find myself wondering why I’m not in an asteroid-mining ship and end up questioning all my life choices.
I’m not sure I completely agree with the number-line-only approach, but I’m definitely sympathetic to it. It reinforces the idea that fractions are numbers like any other numbers, and not pieces of pizza.