You know that small voice you hear in your heart and head? You know that feeling that at the end of the day that remains? Even after you've tutored a student who is struggling in math, had a student stay after school so he can do his homework because it never seems to come back, when you've had a kid mislead you about a scuffle at recess, when you see the mound of papers and notebooks to read and grade?
The voice that tells you - this is a good job. This is where you belong.