don't know what happened by my earlier post, but many students feign sickness to not attend class because it is easier to get back to school, all you need is a letter from the parent stating that the child was sick.  And many students have a friend instead of the parent to prepare the letter.   if you just don't go to school, the student will likely be punished and students don't want that.  there are many students who don't feel the need for and education.  hence, oftentimes a student who claims he/she was sick may not have been sick, they just decided to not go to school that day.