[drivebyhooting]

There’s a huge difference between knowing the alphabet and being able to read a decodable book like Bob, let alone getting to chapter books.

Similarly there’s a huge difference between knowing how to count up and down between small numbers under 10 and mastery of arithmetic.

Here, double digit addition is not covered until late 1st grade. The focus is addition under 20.

[nostrademons]

But there's also a big difference between 18 months and 4 years.

There are definitely preschools in Silicon Valley where the kids are reading chapter books by 4. We chose not to send our kids to one (we don't want them to miss out on play and socialization for academics), but we have a few friends that have sent their kids there.

[drivebyhooting]

Really? Can you share the school’s name? Can you give an example of chapter book so I understand the reading level?