Here are 10 different short blessings for a teacher's day greeting card:

1、"Dear teacher, on this special day, I wish you the best in your teaching journey. Thank you for your dedication and passion."

2、"Thank you for your guidance and support. You have made a significant impact on my life. Happy Teacher's Day!"

3、"May your days be filled with joy and happiness. Happy Teacher's Day to an exceptional teacher!"

4、"On this day of celebration, we honor you for your efforts in our education. You are the guiding light of our path. Best wishes for Teacher's Day."

5、"Wishing you a day full of happiness and peace, with the warmth of a smile always in your heart. Thank you for your role as an educator."

6、"Your wisdom and patience have taught me much more than the books. Thank you for your hard work and dedication. Happy Teacher's Day!"

7、"You have always been a source of inspiration and knowledge. Your impact on our lives is immeasurable. Wishing you a very happy Teacher's Day!"

8、"You have given us not just knowledge but also hope and courage. Thank you for your guidance and support. Happy Teacher's Day!"

9、"On this special day, we celebrate your wisdom, patience, and dedication to our education. Thank you for all that you do! Happy Teacher's Day."

10、"Your teachings have opened our minds and broadened our horizons. Wishing you a Teacher's Day filled with joy and success!"

Each of these blessings is a heartfelt expression of gratitude for the teacher's role in shaping lives and helping students learn. Each of these blessings could be customized and added to a teacher's day greeting card.