Для написания письма на английском языке на тему "школа" приведу пример текста из 60-70 слов:
Dear Friend,
I hope this letter finds you well. I wanted to share with you my thoughts on school. School is a place where we learn new things every day and make lasting memories with friends. I enjoy the classes, especially English and Science. Our teachers are supportive and kind. The school also offers various extracurricular activities like sports and art, which make our experience even more enriching. Overall, I am grateful for the opportunities and friendships I have found at school.
Best regards, [Your Name]