帮我把下文变的简单点，语法通顺

Distinguished leaders, teachers, dear students:
I will tell a story of civilization on the campus
Striving to build a civilization and civilized campus students

One day I saw a few low-grade classmates, walked side by side and talked and laughed the front face of approaching a teacher, they do not know, but when the teacher walked around it a few students, the other person were still talking and laughing, and only one classmate, respectful bow and said sound "good teachers" teacher of course very pleased to answer a "hello", no hum soon as other students. Passed after the other teachers. Some people say that classmates cake, do not know the teacher returned to the bow, and some people say that he basically does not pretend, to others to read. That the students did not refute them, but said one: to be a polite person is a student's bottom line. I was back listening to this sentence is very moved and touched by the sincerity that the students, a person Business Planning really is a rare quality.

敬的各位领导，老师，亲爱的学生：
我会告诉校园文明的故事
努力建设文明，文明的校园学生

有一天，我看到一些低年级同学，走到肩并肩有说有笑有接近前脸老师，他们不知道，但是当老师走周围几个学生，其他人仍在谈判和笑，只有一个同学，尊重鞠躬，说声“好老师”的老师，当然很高兴回答“你好”，一旦没有其他学生的嗡嗡声。通过后，其他教师。有人说，同学蛋糕，不知道老师回到鞠躬，也有人说他根本不假装，给他人阅读。这些学生并没有反驳，但他说一：是一个有礼貌的人是学生的底线。我回来听这句话，非常感动和诚意，学生，商业策划人确实是一个难得的感动。