Alternatively the librarian could also do the rap with the class during library time selecting which replies will be shared. The result of this could then be a display of the rap map, replies and photos in the library or a page on the school's web site or a special activity as part of the rap rap wrap up. If the internet access is only in the library then the librarian will be the person who collects and sends the mail. The mail can be printed for the class teacher to collect. Each class would have their own computer disk with the eudora or other mailing program on it and write their responses which would be saved to the disk and then taken to the librarian who can send the mail at a convenient time.
Librarians can also be coordinators because of their excellent knowledge of books and authors.
They often act as mentors and encourage teachers to take part in a book rap. There are always many reasons why we can't do things as class teachers. There isn't enough time. The curriculum is too crowded. I don't know enough about book raps.