Answer:
Hi, how are you?
long time no see or talk with you, I hope you're good in this moment, I've good and I remember you. I really want to say the new developments there are in the school, Recently the school gives extra classes to improve in subjects, was a good idea.
that's all I want to say you, I hope you are good, and I'm waiting for your answer.
i don't know you can put more in the letter