You get into class and REALLY want to tell the teacher about your weekend. She is running around trying to get ready for class that is about to start. Is it a good time to talk to her about your weekend?
No. She is busy.
You go to your friend's house for dinner and notice he has a big sign for a huge rival to your favorite sports team. Can you still be friends?
Yes. Friends can have different likes and dislikes.
You are in the middle of class and you really don't understand the assignment. What should you do?
Raise your hand, wait to be called on and calmly ask for help.
If you are talking with the teacher and he says "On Tuesday when we go to Second Harvest..." and you know she meant Thursday, should you correct him?
No. You may politely ask him when he is DONE talking, "Did you mean on Thursday?" if you are really confused.