Because a primary school kid's English is better than the teacher. Teacher that supposed to teach English, the kid can correct the teacher's grammar if the kid learn English at home.

That's how far the standard has dropped. I facepalm at level of some gomen school teachers these days.

My friend teach English at Chinese private school,(called as Chinese independent school) . Her English is like what we learn in old days, proper British English.

Another friend teach at private primary school, use homeschooling syllabus. Syllabus in English, so of course all the teachers can speak English well. It's not even International school level yet.

Private Chinese school not that expensive. Last I heard was RM300 a month, for a non profit based one in Melaka.