Then, when your friends show up, achan, as open textbooks, achan, described in the book in order to make the students understand before hand that they do in the book to an understanding of the students.
Later, when your show is finished, open books ethic ethic was explained in the book in order to get students to understand first before doing the books for the understanding of the students.
After that, when my friends show completed master's open book he explains to ฟังใน books in order to make students understand before being made in the book to the understanding of students