"Dear Miss Lancey, I am forever grateful for all your hard work and dedication to education. You have been a fantastic and wonderful teacher this school year.An effective teacher appreciation letter should be personalized. Thank you for making school fun and letting us run around in the morning. I like drawing best, but I always have fun in your class. National Teacher Appreciation Week is May 610. Here are some Teacher Appreciation Week ideas for how to say thank you to educators. A heartfelt thank you note is most appreciated. Thank you for helping me with my classes. This is dedicated to the many teachers and elementary school staff who have enriched my children's lives; you know who you are!