best reward

whats the best reward a teacher can get ?

after working as an Asst. Prof for a semester at my alma mater, Dept of Electrical Engineering, SJCE Mysore, i got the best reward a teacher can ever get. a student, after making himself into IITB, my alma mater again, calls me up to say he has made it to IIT B. now, after a semester there, he still remembers me and is coming to meet me. what more can a teacher, who taught them for a semester can ask for ?
I still remember the first day of this class. My first hour as a teacher.
Having enjoyed teaching to the core, i will always want to be a teacher.