When teachers were giving a lecture, it wasn't as simple as saying what they wanted to teach in the lecture. They had to consider how to stir the interests of students and make them focus. All this needed skill and practice.
Sun Mo had been teaching for close to ten years and had accumulated much experience. At the same time, he had the ancestor-level Divine Sight and grandmaster-level ancient massaging technique. Hence, he would always be able to ensure there were no dry moments in the content of his lectures.
As long as the students came for Sun Mo's lecture, they would be able to gain enlightenment. As to how much they actually gained, that would have to depend on their own comprehension abilities.
Next, Sun Mo completely grasped the situation in the classroom.
A student who originated from minority tribes in the mountains actually had parasites in his intestines due to eating the tribal food, and this inadvertently affected his cultivation.