Taiwanese in the classroom

A Tainan teacher who teaches in Taiwanese in his elementary school class. For math, the class ends up being about 30-40% Taiwanese (as Mandarin is still used for technical nouns). For the social studies class, 90% can be conducted in Taiwanese. For the Mandarin class, vocabulary and readings are done in Mandarin but explanations and discussion are conducted in Taiwanese, making that class about 60-70% Taiwanese as well.

The kids in the class perform on par in testing.

I really prefer this model for native language teaching to the model currently in use of an extra class twice a week in the native language.