Another great idea is find out what she drinks during the day and buy her a case of soda or water to keep at school. She will think you are very thoughtful and the gift is very practical. In the end your child will benefit. Teachers are also known to be one of the largest purchasers of books and are always needing class sets. Or buy a gift certificate to the book store.
Teachers also tend to pass on personal luxuries because money can be better spent.
Choose a gift certificate to a salon or nail boutique. Or choose a gift card to the movies or the rental store. In the end a gift certificate is often the way to go. She will appreciate it a lot more than another ceramic apple. The main thing to avoid is cluttering objects unless your child has a first year teacher who has not accumulated much.