Hi Prof. XXX
Just wanted to say thank you so much for helping me pass math X. Your teaching
style is unbelievable. I hated math all my life and wasn't good at it. You
made me enjoy learning and now I feel confident when doing it. Hopefully, the
Prof for math XX this summer can keep me interested in learning more advanced
math. It was a pleasure meeting you and being your student. I hope we meet
again some day. Thank you again for being by far the BEST prof I've ever had....