Dear friends, We are graduating from now.Most of our textbooks will be useless. What a great waste to throw them away! Why not give used textbooks to the next students. From it, we can learn how to care for other students. This can not only save some paper but help the poor as well. It can also build some hobbies that students read books carefully. Students can learn sharing and feel happy from sharing with others. In a word,it is meaningful for students to learn in school and society. If we all students do it, we will find it helpful for us in different ways. Let"s do it right away and build a harmonious school and world, shall we?