1. The concept of lateness and absence.
Most of the classes in American college have an absence policy. In most cases, students are only allowed 3 classes missed in the semester. Most of the professors are quite in favor for the students to use their three absences wisely in sickness. On the other hand, most school in Thailand, especially at the college level, do not require attendance. Nobody cares if you are coming to class. I personally like the way it works in Thailand because sometimes we all need to miss more than three classes for some accidental event, or even for our own mental wellness. I also believe that if you are a college student, you should have the responsibility to take care of yourself. It is your own choice either you want to pass or fail the class. You pick!