From Ron Clark's Essential 55 Workbook:
Rule 23: Students should quickly learn the names of other teachers in their school and greet them by saying things like "Good Morning" or "Good Afternoon" and say the teacher's name. (If your child is in line with the rest of the class, the no-talking rule is in effect). However, he/she should be encouraged to speak to other teachers when entering or leaving school, at recess, on an errand, or when changing classes.
Rule 24: Your child should know to always flush a toilet and wash his hands after using the restroom.
Rule 25: Your child's classroom will often have visitors. Your child should understand the protocol regarding visitors: Your child should be prepared to shake hands, introduce himself/her to the visitor, and welcome the person to school.