I'm student teaching now and will be asking the principal to come in and observe a lesson. I would like to put a note in her mailbox, but I'm not sure if I should type up a formal letter or just write a note (on a note card or small piece of paper). I'm leaning towards just writing it since it's not something I will be mailing to her. It will just go into her mailbox. What do you think? Any ideas of what I can say? I want to ask her to observe me so I can get her input on my lesson/teaching skills and that she can come at whatever day/time works for her. Thanks.