Dear [name of foreign teacher],
I am writing to express my sincere gratitude for all the guidance and assistance you have provided me during my time with you as an international student. Your hard work, patience and dedication have helped me develop not only my English skills, but also my personal growth and confidence.Your classes have always been lively and interactive, making it easier for me to learn and understand complex concepts. You have gone above and beyond by providing extra materials to help me improve my pronunciation and grammar, and making yourself available for extra help outside of class.Moreover, your understanding and kindness towards cultural differences have made me feel welcomed and supported throughout my studies. Your willingness to share your own experiences and knowledge of different cultures has opened my mind to new perspectives and ideas.I would like to express my deepest gratitude for all the efforts you have put into teaching and helping me. You have not only been a teacher, but also a friend and role model for me, and I will always remember the valuable lessons I have learned from you.Thank you again for everything, and I wish you all the best in your future endeavors.Sincerely,[Your name]