Can anyone give me an idea and find a way to teach my nephew well?

We need to find out if it's because we're stimulated,

Or low memory [must be faced], if not,

Compassion. . . . .

Since you are smart, why don't you study?

You can teach yourself, starting from the third grade.

First, let him realize why learning is difficult. If this understanding is profound, there will be no problem.

On the other hand, let him look for extra-curricular books. Extra-curricular books are healthy and positive, and books have a great influence on people.

In fact, children love to play and can't learn well. There is no need to stare at learning. How is his sports?

Can he program? Does he sing? If he is talented, you can choose which way to train him. Let him find his confidence and hope, which is the most fundamental solution. This confidence is not complacency, but purity. Never criticize him.