The examination is an indication of the quality in Thai students. Every time after complete teaching or after semester finishing. They have to do a test to arrang that students can understand subject content more or less. Many people believe, the exam can explain about knowledge of students such as students’s ability to pass an examination must indicate some of his mental powers as well as his grasp of the subjects that he has studied. In addition, the result examination can provide the knowledge level of the students because each students has different skills. Which some students have to take the time to learn more? Some students can learn easily. Leading to provide students who has knowledge in the same level. Most of the schools in Thailand are divided according to the students. It will be tested before admission to grade the level of student’s knowledge for example The College Level Examination Program (CLEP) is a group of standardized tests that assess college-level knowledge in several subject.It is easier to learn along with our friends who have similar score to study in the same class. Students differ widely in terms of how they learn and the most effective teaching is tailored to each individual exat student.