[wbsss4412]

My take is that the biggest focus, if you want to give them a head start, should be on reading.

The most fundamental skill any elementary school child can learn is how to read. Every single thing they learn in school will at least benefit from a strong reading ability, and this goes for math and science as well.

The biggest place where young students fall down in math, is story problems, not the arithmetic itself. Being able to read a passage and correctly interpret what it is asking is far and away the most important skill a young child can acquire at that age.

[skeeter2020]

I agree, and at this stage let them read whatever they want. It's a huge bonus for the kid, independent progression, life-long and fun.