Subject: Thank you!!
Dear ____________,
Thank you for taking the time to write me a letter of recommendation. I truly appreciate the time and thought you put into supporting my college applications.
Being in your class/club was one of my favorite parts in high school. I’ve learned and grown so much under your guidance, and I know your recommendation will make a real difference as I apply to [college].
I’ll keep you updated as the decisions roll in. Thank you again for everything!
Sincerely,
Name