An important skill

I spoke to a poly student (girl).

TKL - Do you know how to cook?
Girl - No. I never learn it at home.
TKL - It is an important skill. You should learn it from your mother.
Girl - My mother does not know how to cook.
TKL - Who cooks at home?
Girl - My grandmother.
TKL - You should earn this skill from your grandmother. When you study overseas, you need to cook on your own.
Girl - OK.