First, many training institutions only have formal teacher classes, but there is no after-school counseling, such as dictation, grammar explanation and morning reading, which are usually absent, or only concepts without actual counseling. The cost of such training institutions is usually lower than that of their peers.
Second, full-time teachers and part-time teachers. Teachers are the core strength of this industry. Many institutions, including some large ones, and most of the teachers are part-time teachers, so the cost is not high and the cost is relatively lower. Teachers always change, because they are all part-time teachers, and the content of classes is always repeated. The whole course is not effective and wastes time.
Third, classes, large classes, small classes, one-on-one. Most training institutions have these courses. The cost is also from low to high, which is easy to understand. There are more than 20 large classes and 6 small classes. The teacher's attention is evenly distributed on each student, which is definitely different.
I hope I can help you!