Some things you could add to your letter are making education more intriguing, giving rewards that students would want, giving more collaboration projects, allowing students to play music with headphones to concentrate, providing healthy yet delicious lunches, and making the learning environment more comfortable for students.
Explanation: The above isn't to be used as your answer, but you can use the information to create a letter yourself. I just generated some ideas and topics for you. I hope this helps!! :)