What's the difference between tip and hint?
[not a teacher]
Some context might help to clarify your question, but in general, a tip may be given without any solicitation, whereas a hint may be given if there is a known problem/question.
Examples:
Say buddy, I noticed you keep spelling that word wrong. Here's a tip, try a dictionary!
1: Boy, I sure wish I could spell this word correctly.
2: Here's a hint, it's in the dictionary.
***** NOT A TEACHER *****
Tom: I keep forgetting. What's the capital of the United States?
Mona: Here's a hint: Who was the first American president?
Tom: Oh, thanks. George Washington was. Now I remember: Washington, D.C.
*****
Martha: I'm going to visit country X.
George: Oh, yeah? I was there last year.
Martha: Did you like it?
George: Yeah, but here's a tip: use public transportation whenever you can.
Martha: Why?
George: Because many of the taxi drivers are dishonest.