Low attendance rate has been a big problem among colleges and universities.To avoid this problem and finish their teaching tasks, different teachers come up with various methods.There are two common methods as following.

　　在高校中低出勤率一直是一个大问题。为了避免这个问题，完成教学任务，不同的教师想出了不同的方法。 以下是两种常见的方法。