The students must speak polite language at school

Student should speak polite language at school.
1.Most people don't like impolite word.
- Most people would choos to speak with the polite person.
- It's easy to get a good job.
- You feel not preasure.
2.Easier to make friends.
- Easy to talk or address with other people.
- It's good impression.
- You and your partner feel trust each other.
- When you have trouble, you still have your best friend.
3.You can learn and adapt to how speaking to adult or to other people.
- You've got better life in the future.
- You will not be died if you know how to speak to other people politely.
- Everyone look you in good attitude.
- Your charm comes of your good speaking.
4.It is unnatural for students to speak politely with friends
- Yes, if this is already a habit
- Everybody can change their habits
- may seem unnnatural to speak politely at first
- also improve vocabulary
-Yes, if it has no good models

If they grew up in good environment, they become good but if they grew up in bad environment, they become bad.