"You helped me raise my ACT score by a significant margin."

I wanted to let you know that I was admitted into Harvard. I'm convinced that without your help I would not have been able to achieve such a feat, as you helped me raise my ACT score by a significant margin. I took the ACT again in September and was able to raise it to a 33 ( E-33 M-35 R-30 S-34). Thank you for tutoring me and helping me achieve such an accomplishment.

-Sam Fernandez