A formal pre-university course
The formal pre-university courses offered by many universities, once accepted, will become a large number of officially registered students.
You don't need to take IELTS or TOEFL.
Students who pass the preparatory course can take professional courses directly without taking IELTS or TOEFL.
How old is the professor?
Teach as many professors as possible and adapt to the new North American education and thinking mode early.
Small class teaching
Teaching in small classes, with no more than 15 students in each class, is convenient for students to improve their English ability quickly.