“Hello Nat,
I am writing this email to thank you for helping me improve my English and develop better writing and grammar skills. Thanks to your boot camp class, I have improved my score on the SAT to 1540, with a 740 in English (50 more than the previous attempt). Thank you so much for your help with my reading and writing skills, and I do believe that this program is amazing at helping high schoolers develop said skills. I use the techniques in my English essays on an everyday basis.
Thanks”