What are some signs that you may be the teacher's favourite?

when the teacher smiles at you when you say something smart.

the teacher trusts you more than the other students, they ask you if you're finished with your work to help them help others in the class, this could also include catching up another student and the teacher cutting you some slack on that particular assignment in class for helping the other student. you pretty much realize you've become teacher's pet. i know this from personal experience.