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Totally agreed with you. I also taught 7-year old. Fewer than 10% of them would truly understand fraction means ratio. Heck, many of them had a hard time unders

Totally agreed with you. I also taught 7-year old. Fewer than 10% of them would truly understand fraction means ratio. Heck, many of them had a hard time understanding what the word "ratio" means. Even fewer would understand what decimal numbers are or why they exist. I also saw how Russian School of Maths taught 7-year old. They would use an entire year in their honor class to introduce the concept of variable, first using analogies, then using terms like "rules", and eventually formalizing the concept.

vishnugupta 5y ago
> Even fewer would understand what decimal numbers are or why they exist. Heck, even I (40+ yo, software professional for ~16 years) only recently realised the importance of the decimal "dot" notation and its relation to the positional number system while I was teaching my son. And then the importance of "zero" dawned on me. All these years I never appreciated what was all the fuss about the number zero.