Look at the background and experience of foreign teachers
Teachers should focus on choosing any institution, which is directly related to the quality of teaching. Children are in the stage of English enlightenment, so it is very important to cultivate pure pronunciation for later English learning. It is best to study with foreign teachers in the United States and Canada from an early age.
See if the curriculum is systematic.
Why are systematic courses important? When children learn something, they need to experience a proper sense of accomplishment. If the curriculum is too simple, they will feel bored and can't sit still. If it is too difficult, they will be discouraged from learning and even hate learning.
Children like it, can you insist?
The most important thing for children to learn is interest. If they are interested, they can continue to study. So we need to observe whether the courses in training schools are personalized and interactive enough.