What is the ruling on the distinction in teaching quality between school and private classes in terms of adequately conveying things to students?

Question

Teachers must complete the tasks that are expected of them and not fall short of adequately explaining topics, whether they are teaching in a school or giving individual sessions. What some teachers do is a type of breach of trust and deception of the students and the school when they fail to explain topics adequately in class but do it very well during part-time sessions. But there is nothing wrong with a teacher doing his job well in both places.