Font/type as design: Although this may be a step too far, I think it would be really interesting to do a vintage-inspired spread in the yearbook. Of course it should be centered around a subject from the past. But this would make it a lot cooler
vintage book stickers - these were used a long time ago, when bookstores placed them in the books they were selling. Sometimes, when you open an old book you can find one of these either in front or end of the book.