Learning to read and basic maths.

For maths, but they pick it up pretty easily in day to day conversations and activities (ipad and gaming helps, imho)

My 11 year old went to school part time, lasted half a term, but his maths skills were on par with the kids there, if not better. He had never done any formal maths.

I only speak on behalf of our family, everyone has different experiences, but it's still important to recognise that life and education can be done differently.