Want another hint to prevent innumeracy (meaning, not automatically knowing how to add, multiply, estimate, and so on)?
Borrow an idea from Waldorf Schools: stop worrying about reading and teach your kid to knit!
Think about it: knitting means you MUST count and you MUST multiply even if you don’t know what addition and multiplication are (all the while increasing your manual dexterity). If you don’t, your knitting won’t fit your teddy bear and looks like a yarn-bombed porcupine. Instant feedback!