Question

write a letter to your friend who left school for another bringing him or her up to date with the development projects on your school compound ​

Answer 1

Como sugestão de carta em inglês para o amigo que mudou de escola, atualizando-o dos projetos e novidades, eis o seguinte:

Hello, there.

We all are missing you, but at the same time we desire that you be happy and having a lot of friends in your new school.  

About us, the school are improving everyday the compound, so we are expecting more and more. You would like it so much.  

Best regards, your friends.

Essa é minha ideia para a atividade "Write a letter to your friend who left school for another". Espero ter ajudado!