Gifts pose ethical and equity issues. Words of affirmation are something that a person never forgets more than anything else and motivates the teacher in the right sense. Think twice before giving your teacher another apple (or an object with an apple motif). Gift cards, thank you notes, and handmade gifts are better.
I don't know any teacher who doesn't have a bottle of water or a cup (or both) on their desk. It's probably time for an update. If you suspect that your child's teacher isn't earning a living wage, don't hesitate to individually gift cards, useful items, or even cash if you can afford it yourself and if the gifts fall within the ethics of the particular school. If choosing a gift for a teacher that you know they'll like seems too difficult for you, gift cards are always a good option.
Alternatively, you can coordinate an all-class donation, with the participation of each child's family, to increase the price of the gift and ensure that everyone feels included. In the same way, you can also design your gift card as a theme to give them a little rest and relaxation, such as a manicure and pedicure or a gift card for a local spa.