I believe the biggest time i've showed a teacher this is during teacher cadet. I would alway be happy to help the teacher and sometimes would stay after to finish grading. But once after final exams and the last day of school she was stormed with work and had a mountain of papers to do.
So after I finished the exam I surprised her and came to her room to help. We sat there and talked for the rest of the day finishing the grading and just talking. That day I respected her in a new light and I hope she thought the same. With