Children have difficulty in learning.
When children are studying, because the diploma is not very high, with the growth of children's age, we don't understand a lot of content, so we can't help children solve it well.
Communication difficulties
Children are in a rebellious period, it is difficult to communicate with them, even if they talk too much, they are indifferent.
Time is running out.
Not spending much time with the children makes him feel a little lonely.