Dear Teachers and Classmates:

I am writing this letter to express my sincere gratitude for your support and encouragement throughout my high school years and particularly during the grueling process of preparing for the college entrance examination. It is the culmination of my efforts and your unyielding support that I was able to fulfill my dream of getting admitted to my dream university.
The past three years have been some of the most challenging years of my life. The pressure of academics coupled with anxiety about the future and a wide range of emotions that come with being a teenager seemed daunting. Still, all through this period, your unwavering support and encouragement helped me stay motivated and focused.
Thank you, my dear teachers, for your time, patience, and dedication to ensuring we had the necessary knowledge, skills, and guidance to succeed in our academic pursuits. Your door was always open to us, and you were willing to support and encourage us in every way possible. It is through your selflessness, passion, and professionalism that I was able to pass the college entrance exam and make it to my dream university.
A heartfelt thanks to my classmates for being my support system, my friends, and my confidants. We shared many great times together, and even in our toughest moments, we remained one another's rock, proving to each other that we were in this together. The relationships that we formed within our class will remain an integral part of our lives as we continue to walk through life together.
I would also like to thank my parents for their unwavering love and support throughout my life. Their support and sacrifices allowed me to pursue my dreams, and I will always be grateful to them for pushing me to be the best version of myself and teaching me the values of hard work, determination, and resilience.
As I prepare to embark on a new journey, I want to thank everyone who has been part of my high school life for being a crucial part of my success. I am filled with gratitude, and I want you to know that I will always cherish the lessons and moments that we shared together.
In conclusion, my heartfelt thanks go to all of you who have played a role, big or small, in making this journey a success. I will forever be grateful for your selflessness, unwavering love, and support. I am excited to begin a new chapter in life and will always carry with me the fond memories that we shared.
Yours sincerely
[Your Name]