“I don’t know if you remember but I took your class Photography I two years ago. I was an Exchange Student from Austria and I have to really thank you because this class started my passion for Photography. It also opened new oppurtunities for me. Photography is still a hobby  but I just recently  won the first prize at a photography contest. It was a whole paid trip to Australia and it was just amazing. I also took a lot of pictures there [see link]. Well anyway I just wanted to say Thanks for letting me to take this class back then :)”