___________ (Name of the student),
Date: __ /__ / ____ (Date)
___________ (Name of the teacher),
Dear _________ (Name of the student),
I hope this finds you in good health. I am writing this letter to let you know that, the farewell party which your batch of students threw was amazing and worth living every moment. It is been ___ (Number of years) years teaching and living among students, and not even once did I feel I will be living such happy in my coming future.
Thank you so much for making me feel important and for giving me such a beautiful send-off. I will be cherishing each and every moment I spent with you all. I will surely keep you all in my prayers and will hope the best for you. You all being the future of the city, keep in my mind how to grow yourself in every possible way.
Take care till then, and try to keep in touch. I believe I have taught you enough about when and where you will be able to find the right tracks for yourself every single time. Even if you stumble anywhere, feel free to call me up or write to me. I will be happy to help.