I use this fake letter, supposedly written by the president of the National Education Association, at the beginning of the year to gain buy-in from my students that they are special and have been selected for my class. I gather up some supplies or do a reddit teacher gift exchange and put them in box along with this letter (with the blanks filled in correctly). Then I tell them that it arrived in the mail just for them. We read the letter and they are very excited to receive the supplies. For authenticity, add a "real" signature at the bottom.