2. All courses and control modules are orderly, from simple to difficult, from learning to practical activities. Only when one study is finished can you enter the next control module. The former one is finished, and the latter one locks the situation to prevent the children from being casual.
3. In addition, referring to the experience after class, I think this kind of audio broadcasting program course has great limitations. First of all, there is no teacher, no interaction in class. Children can't find a teacher to deal with problems they don't understand. Secondly, for those children who want to practice oral English, it is even more unrealistic and not very handy!