Why doesn't dad recommend new concept English?

The broadcasting course of the new concept is too complicated and too much, and the homogenization is very serious. Middle school teachers bring a set, which is boring and useless. ? It's a little misleading to object that dad is a wet nurse. The broadcast course of the new concept is seriously homogenized-it is strange not to "homogenize" a set of broadcast videos, the same text and the same grammar according to the new concept textbook. Homogenization is a good thing for us, that is, we can buy that at will, pick interested teachers and buy it cheaply. After all, they are all middle school teachers, which is the biggest advantage. Most people with poor English suffer from not listening carefully in middle school teachers' English class and lack of systematic grammar foundation, which is why I strongly recommend the new concept. Lai Shixiong learned American English from scratch, which is very humorous. Yes, it's easy to use, right. But Lai Shixiong didn't speak grammar systematically, so it was boring to listen to his grammar class. Take the second volume of the new concept as an example. In the first three units, the teacher explained the usage every time by appeared. The fourth unit is a review unit. The teacher will summarize and explain all the uses of by and put them together. It seems a bit rigid and boring, but for a person who really wants to learn English well, it's like drinking nectar.