[Not a teacher.]
Miss (TITLE) noun
1 a title or form of address for a girl or a woman who has never been married:
Dr White will see you now, Miss Carter.
Miss Helena Lewis
Compare Ms; Mrs.
2 OLD-FASHIONED used as a form of address for a girl or young woman who does not appear to be married:
Excuse me, Miss, could you tell me the way to the station?
3 MAINLY UK sometimes used by children to address teachers who are women:
Can I go to the toilet, Miss?
4 When a woman wins a beauty competition, she is often given the title Miss and the name of the place that she represents:
the Miss World contest
5 UK OLD-FASHIONED miss a girl or young woman, especially one who behaves rudely or shows no respect:
You're a cheeky little miss! Apologize at once.The definitions are from Cambridge Dictionary. I think these are clear enough.Ms (TITLE) noun [U]
a title used before the family name or the full name of a woman, whether she is married or not:
Ms Hill/Ms Paula Hill
[as form of address] What can I do for you, Ms Wood?
Student or Learner