To improve their knowledge, Khmer and Thai students have their daily meeting, especially on Tuesday. The purpose this meeting is for exchanging knowledge and experiences from each other. They are not real teacher or instructors for each, but they can help each other the goal of language skills, i.e. listening and speaking, that each of them has just learned in class with their teacher. On their first cession is to improve pronunciation which is the basic of language study. Problem occures to Thai students who learning Khmer language is the problem of some vowels, especially Khmer dipthongs. As for Khmer students, the problem is the tone that exists in Thai but does not in Khmer.