[octobus2021]

This might work if your kid is a self-starter and really driven to improve himself/herself. Otherwise I highly recommend an extracurricular math program; there are many different ones depending on which area you are in. I know of Kumon and Mathnasium, there's probably bunch of other ones too.

They maintain their own curriculum, often somewhat in sync with school program, but ahead of it. They also help kids participate in various math competitions, including Math Kangaroo, AMC 8/10, etc.

Just make sure to carefully evaluate the program in advance, talk to the teachers and the parents. They are typically NOT cheap, but if you want your kids to get good at "maths" (R) it'll be worth it.

[luyu_wu]

As a teenager who has went to one of these in the past, I can vouch. It definetly gave me a stronger foundation that other kids which has helped me a lot with physics and other interests!