"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

"You helped her immensely"

"Shahar, I just want to thank you for working with my daughter over the past few weeks.  She really felt like you helped her immensely.  The math practice was great and really reduced her anxiety over any surprises that might have cropped up.  The tips you gave her for essay writing were extremely beneficial — and they really increased her confidence in writing on demand (for life as well as the SAT’s)." -Elizabeth A.