Someone asks how school was, you had a bad day and don't want to talk about it. How could you respond?
Say "Sorry, I don't want to talk about it", "can we talk about it later", "not the best day, but I don't want to talk about it", etc.
Some says asks how you are, how should you respond?
how you're feeling (good, alright, fine, etc.) and then ask how they are
Someone says good morning and smile while passing you in the hallway, how should you respond?
Good morning, smile, nod, etc.