[user205738]

Math is difficult for children because for them it's learning a lot of unrelated rules in their head that don't even have a reflection for them in their everyday experience. And these textbooks are trying to create this connection.

Thank you for your work, I am always happy when good books are translated.

[user205738]

I don't know if the author also posts on HN, but you can say thank you to TS, otherwise I wouldn't have seen this post)