Some days will also be filled with rewards. While you should not expect these little treats, you can feel confident that they will happen. A chronically disruptive student might experience a turnaround, a slower student might grasp a difficult concept, or a simple discussion might serve as an excellent educational experience. These are the moments that will continue to motivate you through your career.
One of the most wonderful rewards of teaching is having former students come back to tell you how much you influenced them. Students will sometimes write you letters or notes expressing how important you were or are to them. If you remember back to your school days, you can probably think of a couple of teachers who were truly influential. Strive to be that teacher for your students, and you will be well rewarded.