Dear Mom,
Hope all is well in London! Are you having a good time?
Recently, my school has underwent some changes. For example, (List your change here). This really made me feel (emotion). I think it was for the (better or worst). Another thing that happened is (event). I think this was very (emotion). These changes gave me a chance to (do something, try something etc), so I think it was (beneficial or not good). Please write me back soon.
Miss you,
(Your name)