They usually have immersion based classes based on the children's age. Classes are supposed to be taught in English only. If you have preschool aged kids that don't have any English ability yet, it will typically be a bilingual class in which they'll have Chinese teachers who speak both Chinese and English to help you. With older children, they do still sometimes have these teachers and when child's English level is more advanced, they usually give hints and tips on planning and marking and manage behaviour in the classroom.
They usually have immersion based classes based on the children's age. Classes are supposed to be taught in English only. If you have preschool aged kids that don't have any English ability yet, it will typically be a bilingual class in which they'll have Chinese teachers who speak both Chinese and English to help you. With older children, they do still sometimes have these teachers and when child's English level is more advanced, they usually give hints and tips on planning and marking and manage behaviour in the classroom.