Whether the first school is formal, whether it has teaching qualifications, whether it has a school license and the size of the school.
The second is the teacher, how about the skills of the teacher and what the skills will be conveyed to the students.
The third school has hidden consumption. Are the expenses of the school clearly listed before entering the school, telling students the expenses during the school?
The fourth is planning. The teaching plan of the school reflects the teacher's sense of responsibility to the students.
I hope my answer can help you!